Update Dockerfile to a functional multistage build

[danfmsouza]

🚀 Dockerfile Optimization: Key Changes and Improvements

The latest updates to the Dockerfile introduced several significant enhancements. Below is a breakdown of the key changes and their benefits.

---

🌍 Global Variables (ARG)

• Centralized important configurations at the top of the file.
• Improved version control for Node.js and Meteor.
• Standardized directory structure for better organization and maintainability.

---

⚡ Build Optimization

• Switched to node:14-slim as the base image to reduce image size.
• Improved layer organization to optimize Docker's caching mechanism.
• More efficient removal of unnecessary files to keep the final image lightweight.

---

🔒 Security Enhancements

• Consistent use of a non-root user (mt) for improved security.
• Minimal installation of dependencies to reduce attack surface.
• Removed sensitive and temporary files to avoid unnecessary exposure.

---

🏗️ Code Structure Improvements

Dockerfile Enhancements

• Used npm ci --omit=dev for faster and cleaner dependency installations.
• Optimized the final bundle by removing unnecessary files.
• Improved npm cache management to avoid excessive storage usage.
• Clear separation between build and runtime stages for better maintainability.
• Switched to Alpine Linux in the runtime stage for a smaller footprint.

---

⚙️ Runtime Environment Improvements

• Cleaner Meteor environment configuration for improved stability.
• Better management of environment variables to avoid conflicts.
• Proper exposure of port 3000 for service accessibility.
• Used CMD instead of ENTRYPOINT for greater flexibility when running the container.

---

These optimizations make the Docker image lighter, more efficient, and more secure, ensuring faster builds and a better deployment experience. 🚀

[ExtraTNT]

should also fix gateway issues, at least for me i had them before going for Entrypoint with []... took me way too long

[danfmsouza]

should also fix gateway issues, at least for me i had them before going for Entrypoint with []... took me way too long

Thanks! I’ll check it out. I made those changes just to simplify deployment in a test pipeline I was using, so yeah, it probably needs some tweaks to be in good shape. I’ll also build on what @ShinySaana Saana did in another PR and clean this up here too!