Express to Nestjs

[IntegerAlex]

PR Type

Enhancement, Tests, Configuration changes

---

Description

• Migrated the project from Express to NestJS framework.

  • Introduced modular architecture with modules like auth, container, deployment, htmx, redis, subdomain, and user.
  • Added controllers, services, and modules for each feature.

• Implemented a login system with session management and error handling.

• Added container deployment and subdomain setup functionalities.

  • Utilized podman for container management and nginx for subdomain configuration.

• Integrated Redis for caching and deployment tracking.

• Updated project configuration files for NestJS compatibility.

  • Added eslint, tsconfig, and jest configurations.

---

Changes walkthrough 📝

	Relevant files
Enhancement	28 files index.ts Added frontend login form submission logic                              +38/-0    app.module.ts Defined main application module with imports                          +25/-0    auth.controller.ts Added authentication controller for login endpoint              +20/-0    auth.module.ts Created authentication module with controller and service +10/-0    auth.service.ts Implemented authentication service with login logic            +14/-0    config.module.ts Added configuration module for environment variables          +9/-0      container.controller.ts Added container controller for deployment actions                +19/-0    container.module.ts Created container module with controller and service          +10/-0    container.service.ts Implemented container service for deployment and image creation +51/-0    database.module.ts Configured database module with TypeORM and PostgreSQL      +20/-0    deployment.controller.ts Added deployment controller for fetching deployments          +13/-0    deployment.module.ts Created deployment module with controller and service        +13/-0    deployment.service.ts Implemented deployment service with tracking and retrieval +40/-0    htmx.controller.ts Added HTMX controller for container and deployment management +64/-0    htmx.module.ts Created HTMX module with controller and service                    +13/-0    htmx.service.ts Implemented HTMX service for deployment and subscription logic +47/-0    main.ts Bootstrap application with NestJS factory                                +11/-0    redis.module.ts Added Redis module with service for caching                            +9/-0      redis.service.ts Implemented Redis service for key-value operations              +24/-0    subdomain.controller.ts Added subdomain controller for DNS and SSL setup                  +20/-0    subdomain.module.ts Created subdomain module with controller and service          +10/-0    subdomain.service.ts Implemented subdomain service for DNS and nginx configuration +83/-0    user.controller.ts Added user controller for registration and subscription    +18/-0    user.entity.ts Defined user entity for database schema                                    +23/-0    user.module.ts Created user module with controller and service                    +13/-0    user.service.ts Implemented user service for user management                          +32/-0    container.util.ts Added utility functions for container management                  +32/-0    server.util.ts Added utility functions for server and subdomain setup      +79/-0
Documentation	1 files README.md Updated README with NestJS project details                              +101/-0
Configuration changes	4 files eslint.config.mjs Added ESLint configuration for NestJS                                        +35/-0    nest-cli.json Added NestJS CLI configuration                                                      +8/-0      tsconfig.build.json Added build-specific TypeScript configuration                        +4/-0      tsconfig.json Updated TypeScript configuration for NestJS                            +15/-24
Dependencies	1 files package.json Updated dependencies and scripts for NestJS                            +66/-43

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📝 Walkthrough

Summary by CodeRabbit

• New Features

  • Introduced a rebranded, robust web interface with a dedicated login page and dashboard for managing container deployments.
  • Enabled streamlined container deployments with automated subdomain setup and real-time deployment tracking.

• Style

  • Revamped UI with new foundational styles for a modern, responsive, and user-friendly experience.

Walkthrough

This pull request represents a comprehensive overhaul of the project. The repository has transitioned from an older Flexr/Express setup to a NestJS-based architecture with a complete restructuring of configuration, documentation, and dependency management. New NestJS modules, controllers, services, and entities have been introduced for features such as authentication, container deployments, deployments management, subdomain setup, and HTMX functionality. The TypeScript, ESLint, and package configurations have been modernized. Additionally, a new React/Vite frontend has been implemented while legacy server, database, and utility files have been removed.

Changes

File(s)	Change Summary
.gitignore, frontend/.gitignore	Expanded ignore rules to exclude build outputs, logs, IDE files, temporary directories, and node_modules.
README.md, .env.example, tsconfig.json, tsconfig.build.json	Updated documentation to focus on NestJS, added new environment variables, and modernized TypeScript compiler settings.
eslint.config.mjs, nest-cli.json, vite.config.js, frontend/eslint.config.js	Introduced new linting and CLI/build configurations for both NestJS and the React/Vite frontend.
package.json (root) and frontend/package.json	Overhauled project metadata, renamed project (Flexr → Fenrir), updated scripts, dependencies, and devDependencies to support NestJS and React development.
src/** (e.g., app.module.ts, auth/*, container/*, deployment/*, config/*, db/database.module.ts, htmx/*, subdomain/*, main.ts, utils/*)	Added numerous NestJS modules, controllers, services, and entities covering authentication, container deployment, deployments, configuration, HTMX features, database connectivity, and subdomain management.
server/*, db/*, frontend/(dashboard.html, home.css, styles.css)	Removed legacy Express server, container utilities, database scripts, and outdated frontend pages/styles to consolidate the new architecture.
frontend/components/*, frontend/src/*, frontend/style/base.css	Introduced new React components and entry files for a modern frontend UI with client-side routing and styling using Vite.

Sequence Diagram(s)

Authentication Flow

sequenceDiagram
    participant Client
    participant AuthController
    participant AuthService

    Client->>AuthController: POST /auth/login { passKey }
    AuthController->>AuthService: login(passKey)
    alt Valid passKey
        AuthService-->>AuthController: sessionId
        AuthController->>Client: Set cookie, 200 OK (success message)
    else Invalid passKey
        AuthService-->>AuthController: null
        AuthController->>Client: 401 Unauthorized (error message)
    end

Loading

Container Deployment Workflow

sequenceDiagram
    participant User
    participant ContainerController
    participant ContainerService
    participant DeploymentService
    participant SubdomainService

    User->>ContainerController: POST /container/run with deployment data
    ContainerController->>ContainerService: runContainer(body)
    ContainerService->>DeploymentService: addDeployment(projectName, containerId)
    ContainerService->>SubdomainService: setupSubdomain(subdomain, port, dnsRecordId)
    ContainerService-->>ContainerController: return deployment details
    ContainerController->>User: JSON response (success or error)

Loading

Poem

I'm a rabbit with a heart so light,
Hopping through code with every byte.
NestJS modules bloom like spring,
Frontend React makes my ears ring.
I leap with joy as changes unfurl—
A code bunny celebrating a brighter world!
🐰✨

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📥 Commits

Reviewing files that changed from the base of the PR and between 0b4fe57 and 05e0824.

📒 Files selected for processing (1)

• frontend/components/DeploymentForm.jsx (1 hunks)

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PR Code Suggestions ✨

Latest suggestions up to ddfd2ec

Category	Suggestion	Impact
Possible issue	Fix component import paths The import paths for components are incorrect. They should be imported from './components' directory (relative to src) instead of '../components' which would look outside the src directory. frontend/src/App.jsx [1-4] import React from 'react'; import { BrowserRouter as Router, Routes, Route } from 'react-router-dom'; -import LoginForm from '../components/LoginForm'; -import Dashboard from '../components/Dashboard'; +import LoginForm from './components/LoginForm'; +import Dashboard from './components/Dashboard'; Apply this suggestion Suggestion importance[1-10]: 9 __ Why: The import paths are incorrect and would cause runtime errors. The components should be imported from './components' (relative to src) instead of '../components' which would look outside the src directory.	High
	Fix CSS import path The CSS import path is incorrect. It should be imported from './style/base.css' (relative to src) instead of '../style/base.css' which would look outside the src directory. frontend/src/index.jsx [4] -import '../style/base.css'; // Optionally import your CSS here (or base.css) +import './style/base.css'; // Optionally import your CSS here (or base.css) Apply this suggestion Suggestion importance[1-10]: 9 __ Why: The CSS import path is incorrect and would cause the stylesheet to not be found. It should be imported from './style/base.css' instead of '../style/base.css' which would look outside the src directory.	High
	Use stable Node version Node.js version 22 is currently not a stable release. Using this version in a Dockerfile may lead to compatibility issues or unexpected behavior. Consider using a stable LTS version like 20-alpine instead. src/utils/container.util.ts [9] -FROM node:22-alpine +FROM node:20-alpine WORKDIR /app COPY . . RUN npm install && ${buildCommand} EXPOSE 8080 CMD ["${runCommand}", "${entryPoint}"] [To ensure code accuracy, apply this suggestion manually] Suggestion importance[1-10]: 8 __ Why: This suggestion addresses a potentially serious issue by recommending a stable LTS Node.js version instead of version 22, which is not yet stable. Using an unstable version in production could lead to compatibility issues and application failures.	Medium
	✅ Add API response validation Suggestion Impact: The commit implemented error handling for the GitHub API request by changing from promise-based to async/await pattern and properly handling errors. While the implementation approach differs from the suggestion, it addresses the same concern of properly handling API responses. code diff: + try { + const response = await fetch( + `https://api.github.com/users/${this.nickname}/repos`, + { method: 'GET' } + ); + const data = await response.json(); + const repositories = data.map((repo: any) => ({ + name: repo.name, + url: repo.html_url, + })); + const avatarUrl = data[0]?.owner?.avatar_url; + res.status(HttpStatus.OK).json({ + success: true, + data: { + repositories, + avatarUrl, + }, }); - }) - .catch((error) => { + } catch (error) { console.error('Error fetching repositories:', error); - res.status(500).send('Error fetching repositories'); - }); + res.status(HttpStatus.INTERNAL_SERVER_ERROR).json({ + success: false, + error: 'Error fetching repositories', + }); + } The GitHub API request lacks error handling for the initial fetch response. You should check if the response is successful (status code 200-299) before processing the JSON data to prevent potential errors when the API returns non-200 responses. src/htmx/htmx.controller.ts [78-92] @Get('v1/repositories') async getRepositories(@Res() res: Response) { fetch(`https://api.github.com/users/${this.nickname}/repos`, { method: 'GET'}) - .then((response) => response.json()) - .then((data: any) => { - const repositories = data.map( - (repo: { name: string; html_url: string }) => ({ - name: repo.name, - url: repo.html_url, - }) - ); - res.send({ - repositories: repositories, - avatar_url: data[0]?.owner?.avatar_url, - }); + .then((response) => { + if (!response.ok) { + throw new Error(`GitHub API responded with status: ${response.status}`); + } + return response.json(); }) - .catch((error) => { - console.error('Error fetching repositories:', error); - res.status(500).send('Error fetching repositories'); + .then((data: any) => { + const repositories = data.map( + (repo: { name: string; html_url: string }) => ({ + name: repo.name, + url: repo.html_url, + }) + ); + res.send({ + repositories: repositories, + avatar_url: data[0]?.owner?.avatar_url, }); +}) +.catch((error) => { + console.error('Error fetching repositories:', error); + res.status(500).send('Error fetching repositories'); +}); } [To ensure code accuracy, apply this suggestion manually] Suggestion importance[1-10]: 7 __ Why: This suggestion adds important error handling for the GitHub API request by checking if the response is successful before processing the JSON data. This prevents potential runtime errors when the API returns non-200 responses, improving the robustness of the application.	Medium
General	Fix documentation URL The URL for Vite documentation is incorrect. It should be 'https://vitejs.dev/config/' instead of 'https://vite.dev/config/'. frontend/vite.config.js [4] -// https://vite.dev/config/ +// https://vitejs.dev/config/ Apply this suggestion Suggestion importance[1-10]: 2 __ Why: The URL for Vite documentation is incorrect, but this is just a comment and won't affect functionality. It's a minor documentation issue with minimal impact on the code.	Low
Update

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Previous suggestions

✅ Suggestions up to commit 2d43bc1

Category	Suggestion	Impact
Possible issue	✅ Fix API endpoint path The login endpoint in the frontend code doesn't match the actual endpoint path defined in the AuthController. The frontend is using '/login' but the controller is configured to use '/auth/login'. frontend/index.ts [14-21] -const response = await fetch('/login', { +const response = await fetch('/auth/login', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ passKey }), credentials: 'same-origin' }); [Suggestion has been applied] Suggestion importance[1-10]: 9 __ Why: The suggestion correctly identifies a critical mismatch between the frontend API call to '/login' and the actual backend endpoint '/auth/login' defined in AuthController. This would cause authentication failures, preventing users from logging in.	High
	✅ Fix GitHub API URL Suggestion Impact: The commit directly implemented the suggestion by correcting the GitHub API URL to include '/users/' in the path, which is required for the API to work properly code diff: - fetch(`https://api.github.com/${this.nickname}/repos`, { + fetch(`https://api.github.com/users/${this.nickname}/repos`, { The GitHub API URL is incorrectly formatted. It should be 'https://api.github.com/users/{username}/repos' instead of 'https://api.github.com/{username}/repos'. src/htmx/htmx.controller.ts [78-79] @Get('v1/repositories') async getRepositories(@Res() res: Response) { - fetch(`https://api.github.com/${this.nickname}/repos`, { + fetch(`https://api.github.com/users/${this.nickname}/repos`, { method: 'GET'}) .then((response) => response.json()) .then((data: any) => { const repositories = data.map( (repo: { name: string; html_url: string }) => ({ name: repo.name, url: repo.html_url, }) ); res.send({ repositories: repositories, avatar_url: data[0]?.owner?.avatar_url, }); }) .catch((error) => { console.error('Error fetching repositories:', error); res.status(500).send('Error fetching repositories'); }); } Suggestion importance[1-10]: 8 __ Why: The suggestion correctly identifies an incorrect GitHub API URL format that would cause repository fetching to fail. The proper format requires '/users/' in the path, which is essential for the application's repository listing functionality.	Medium
	Use valid Node.js version The Dockerfile template uses Node.js version 22, which doesn't exist yet (as of 2023). Use a stable version like 18-alpine or 20-alpine instead. src/utils/container.util.ts [9] -FROM node:22-alpine +FROM node:20-alpine WORKDIR /app COPY . . RUN npm install && ${buildCommand} EXPOSE 8080 CMD ["${runCommand}", "${entryPoint}"] Suggestion importance[1-10]: 7 __ Why: The suggestion correctly identifies that Node.js version 22 doesn't exist yet. Using a non-existent version would cause container builds to fail, affecting the core deployment functionality of the application.	Medium

✅ Suggestions up to commit 3b90807

Category	Suggestion	Impact
Possible issue	✅ Fix GitHub API URL Suggestion Impact: The commit directly implemented the suggestion by correcting the GitHub API URL to include '/users/' in the path, which is required for the API to work properly code diff: - fetch(`https://api.github.com/${this.nickname}/repos`, { + fetch(`https://api.github.com/users/${this.nickname}/repos`, { The GitHub API URL is incorrect. It should be https://api.github.com/users/${this.nickname}/repos instead of https://api.github.com/${this.nickname}/repos. The current URL will result in a 404 error when trying to fetch repositories. src/htmx/htmx.controller.ts [78-96] @Get('v1/repositories') async getRepositories(@Res() res: Response) { - fetch(`https://api.github.com/${this.nickname}/repos`, { + fetch(`https://api.github.com/users/${this.nickname}/repos`, { method: 'GET'}) .then((response) => response.json()) .then((data: any) => { const repositories = data.map( (repo: { name: string; html_url: string }) => ({ name: repo.name, url: repo.html_url, }) ); res.send({ repositories: repositories, avatar_url: data[0]?.owner?.avatar_url, }); }) .catch((error) => { console.error('Error fetching repositories:', error); res.status(500).send('Error fetching repositories'); }); } Suggestion importance[1-10]: 9 __ Why: The current GitHub API URL is incorrect and would result in a 404 error. This is a critical fix as it would prevent the application from fetching any repositories, breaking core functionality.	High
	✅ Fix login endpoint URL Suggestion Impact: The commit implemented exactly what was suggested - changing the fetch URL from '/login' to '/auth/login' to match the backend controller endpoint code diff: - const response = await fetch('/login', { + const response = await fetch('/auth/login', { The frontend is making a request to '/login' but the API endpoint in the NestJS controller is '/auth/login'. This mismatch will cause login requests to fail. Update the endpoint URL to match the controller route. frontend/index.ts [13-21] try { - const response = await fetch('/login', { + const response = await fetch('/auth/login', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ passKey }), credentials: 'same-origin' }); Suggestion importance[1-10]: 9 __ Why: The frontend code is making requests to '/login' but the NestJS controller defines the endpoint as '/auth/login'. This mismatch would prevent users from logging in, which is a critical functionality issue.	High
	Fix async/sync method mismatch The login method is synchronous but is being called with await in the controller. This creates a type mismatch as the controller expects a Promise. Change the method to return a Promise by making it async or wrapping the return value in Promise.resolve(). src/auth/auth.service.ts [7-12] @Injectable() export class AuthService { - login(passKey: string): string | null { + async login(passKey: string): Promise<string | null> { if (passKey === process.env.PASS_KEY) { return Math.random().toString(36).substring(2); // Generate session ID } return null; } } Suggestion importance[1-10]: 7 __ Why: The login method in AuthService is synchronous but is being awaited in the controller. Making it async ensures type consistency and prevents potential issues with Promise handling in the controller.	Medium

✅ Suggestions up to commit d7a440f

Category	Suggestion	Impact
Possible issue	✅ Fix API endpoint path Suggestion Impact: The commit implemented exactly the suggested change, removing the leading slash from the login endpoint path to match the frontend's expected URL code diff: - @Post('/login') + @Post('login') The login endpoint is defined at '/auth/login' but the frontend is sending requests to '/login'. This path mismatch will cause login attempts to fail. Update the endpoint path to match the frontend's expected URL. src/auth/auth.controller.ts [10-19] -@Post('/login') +@Post('login') async login(@Req() req: Request, @Res() res: Response) { const { passKey } = req.body; const sessionId = await this.authService.login(passKey); if (sessionId) { res.cookie('sessionId', sessionId, { httpOnly: true, secure: false }); return res.status(200).json({ message: 'Login successful' }); } return res.status(401).json({ message: 'Unauthorized' }); } [Suggestion has been applied] Suggestion importance[1-10]: 9 __ Why: This is a critical fix that addresses a path mismatch between the frontend and backend. The frontend sends requests to '/login' but the controller defines the endpoint as '/auth/login', which would cause all login attempts to fail.	High
	Fix invalid Node.js version The Dockerfile template uses Node.js version 22-alpine which doesn't exist yet (as of 2023). This will cause container builds to fail. Use a stable, existing Node.js version like 18-alpine or 20-alpine instead. src/utils/container.util.ts [9-14] -FROM node:22-alpine +FROM node:20-alpine WORKDIR /app COPY . . RUN npm install && ${buildCommand} EXPOSE 8080 CMD ["${runCommand}", "${entryPoint}"] Suggestion importance[1-10]: 8 __ Why: The suggestion fixes a critical issue with the Docker template using Node.js version 22-alpine which doesn't exist yet. This would cause all container builds to fail, preventing the core functionality of the application.	Medium

✅ Suggestions up to commit fd485db

Category	Suggestion	Impact
Possible issue	✅ Fix API endpoint path The login endpoint path doesn't match the frontend fetch URL. The frontend is making requests to '/login' but the controller is defining the route as 'auth/login', which will cause authentication failures. src/auth/auth.controller.ts [10-19] -@Post('login') +@Post('/login') async login(@Req() req: Request, @Res() res: Response) { const { githubUsername, passKey } = req.body; const sessionId = await this.authService.login(githubUsername, passKey); if (sessionId) { res.cookie('sessionId', sessionId, { httpOnly: true, secure: false }); return res.status(200).json({ message: 'Login successful', githubUsername }); } return res.status(401).json({ message: 'Unauthorized' }); } [Suggestion has been applied] Suggestion importance[1-10]: 9 __ Why: The suggestion correctly identifies a critical mismatch between the frontend fetch URL ('/login') and the backend endpoint ('auth/login'). This would cause authentication failures, preventing users from logging in.	High
	Fix entity reference The User entity is imported in the TypeOrmModule but it's not defined in the codebase. Instead, the file imports from user.entity.ts which only contains the Deployment entity, causing a runtime error. src/user/user.module.ts [7-13] @Module({ - imports: [TypeOrmModule.forFeature([User])], // Register the User entity with TypeORM + imports: [TypeOrmModule.forFeature([Deployment])], // Register the Deployment entity with TypeORM controllers: [UserController], // Include the user controller providers: [UserService], // Include the user service exports: [UserService], // Export the service if needed in other modules }) export class UserModule {} Suggestion importance[1-10]: 8 __ Why: The suggestion identifies a significant issue where the User entity is referenced in the TypeOrmModule but doesn't exist in the codebase. The PR only defines a Deployment entity in user.entity.ts, which would cause runtime errors.	Medium
	Fix async function return type The login method is declared to return string | null, but the TypeScript Promise wrapper is missing. Since the method uses createDirectory which is likely asynchronous, it should be marked as async and return a Promise. src/auth/auth.service.ts [5-13] @Injectable() export class AuthService { - login(githubUsername: string, passKey: string): string | null { + async login(githubUsername: string, passKey: string): Promise<string | null> { if (passKey === process.env.PASS_KEY) { - createDirectory(githubUsername); + await createDirectory(githubUsername); return Math.random().toString(36).substring(2); // Generate session ID } return null; } } Suggestion importance[1-10]: 7 __ Why: The suggestion correctly identifies that the login method uses createDirectory which is likely asynchronous, but doesn't properly declare itself as async or return a Promise, which could lead to timing issues and unexpected behavior.	Medium
Security	Secure cookies in production The secure cookie option is set to false, which means cookies will be sent over HTTP. In production environments, this is a security risk as it exposes session cookies to potential interception. Consider using environment variables to set this value to true in production. src/auth/auth.controller.ts [10-19] @Controller('auth') export class AuthController { constructor(private readonly authService: AuthService) {} @Post('login') async login(@Req() req: Request, @Res() res: Response) { const { githubUsername, passKey } = req.body; const sessionId = await this.authService.login(githubUsername, passKey); if (sessionId) { - res.cookie('sessionId', sessionId, { httpOnly: true, secure: false }); + const isProduction = process.env.NODE_ENV === 'production'; + res.cookie('sessionId', sessionId, { httpOnly: true, secure: isProduction }); return res.status(200).json({ message: 'Login successful', githubUsername }); } return res.status(401).json({ message: 'Unauthorized' }); } } Suggestion importance[1-10]: 9 __ Why: Setting cookies with secure:false is a significant security vulnerability as it allows session cookies to be transmitted over insecure HTTP connections. The suggested improvement adds environment-based configuration that enforces secure cookies in production environments, protecting against session hijacking attacks.	High
	Avoid hardcoded IP addresses The IP address '35.223.20.186' is hardcoded in the DNS record creation. This creates a maintenance issue if the server IP changes and poses a security risk by exposing the IP address in the code. Use an environment variable instead to make the application more configurable and secure. src/subdomain/subdomain.service.ts [21-48] private async addDnsRecord(subdomain: string, dnsRecordId: string): Promise<void> { const zoneId = process.env.CLOUDFLARE_ZONE_ID; const url = `https://api.cloudflare.com/client/v4/zones/${zoneId}/dns_records`; const data = { type: 'A', name: `${subdomain}.flexr`, - content: '35.223.20.186', + content: process.env.SERVER_IP || '127.0.0.1', ttl: 120, proxied: false, comment: 'Domain verification record', tags: [], id: dnsRecordId, }; const response = await fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/json', 'X-Auth-Email': process.env.CLOUDFLARE_EMAIL || '', 'X-Auth-Key': process.env.CLOUDFLARE_GLOBAL_TOKEN || '', }, body: JSON.stringify(data), }); if (!response.ok) { throw new Error('Error updating DNS record'); } } Suggestion importance[1-10]: 8 __ Why: Hardcoding the IP address '35.223.20.186' creates both a maintenance burden and a security risk by exposing server information. Using an environment variable makes the application more configurable and follows security best practices for infrastructure configuration.	Medium
General	✅ Avoid dynamic require Suggestion Impact: The commit removed the getPort method with the dynamic require('net') and replaced it with an imported getPort function from container.util code diff: +import { createDirectory , getPort } from '../utils/container.util'; import { DeploymentService } from '../deployment/deployment.service'; import { SubdomainService } from '../subdomain/subdomain.service'; @@ -17,11 +17,9 @@ async runContainer(body: any) { const { userName, projectName, repoLink, entryPoint, buildCommand, runCommand } = body; - - await this.deploymentService.trackDeployment(userName); - + const imageName = `${userName.toLowerCase()}-${projectName}`; - const port = await this.getPort(8081); + const port = await getPort(8081); await this.createImage(userName, projectName, repoLink, entryPoint, buildCommand, runCommand); const { stdout } = await execAsync(`podman run -d -p ${port}:8080 -t localhost/${imageName}:latest`); @@ -32,15 +30,6 @@ return { containerId, imageName, status: 'deployed' }; } - private async getPort(findPort: number): Promise<number> { - const server = require('net').createServer(); - return new Promise((resolve) => { - server.once('error', (err) => resolve(err.code === 'EADDRINUSE' ? this.getPort(findPort + 1) : findPort)); - server.once('listening', () => server.close(() => resolve(findPort))); - server.listen(findPort); - }); - } The dynamic import of 'net' module using require() inside a class method is not recommended in TypeScript. Import the module at the top of the file instead. This will improve type safety and avoid potential runtime errors. src/container/container.service.ts [35-42] private async getPort(findPort: number): Promise<number> { - const server = require('net').createServer(); + const server = net.createServer(); return new Promise((resolve) => { server.once('error', (err) => resolve(err.code === 'EADDRINUSE' ? this.getPort(findPort + 1) : findPort)); server.once('listening', () => server.close(() => resolve(findPort))); server.listen(findPort); }); } [Suggestion has been applied] Suggestion importance[1-10]: 7 __ Why: Using dynamic require() for the 'net' module is poor practice in TypeScript as it bypasses type checking and module resolution. Since 'net' is already imported at the top of the file (line 3), this change improves code consistency and type safety.	Medium