ci: add CI/CD pipeline and Astro Starlight docs site

[Amit9917]

What changed

This PR adds a full CI/CD pipeline and a documentation site for GS360, mirroring the pattern from Jina Connect Unified CPaaS.

CI Pipeline (.github/workflows/ci.yml)

• Lint & Security Scan — Ruff lint + format check, Bandit security scan on all Python code
• Backend Tests — py_compile syntax checks, pytest with coverage, integration checks, content pack validation, optional mypy type check
• Frontend Build & Lint — Next.js ESLint, TypeScript type check (tsc --noEmit), production build
• Secret Leak Detection — TruffleHog scans full git history for leaked credentials
• Docker Build Validation — Validates the Dockerfile compiles on pushes to main
• Concurrency groups to cancel in-progress runs on new pushes

Docs Site (docs/)

• Astro Starlight documentation site with full-text search (Pagefind)
• Pages: Introduction, Quickstart, Configuration, Architecture Overview, API Reference, Content Pack Guide, Contribution Guide
• Content derived from existing README.md, CONTRIBUTING.md, CONTENT_GUIDE.md, and implementation_plan.md

Docs Deploy (.github/workflows/deploy-docs.yml)

• Triggers on pushes to main that touch docs/**
• Builds Astro site and deploys to GitHub Pages

Other

• Updated .gitignore to exclude Astro build artifacts

[Copilot]

Pull request overview

This PR introduces a GitHub Actions CI pipeline for GS360 and adds an Astro Starlight documentation site, including a GitHub Pages deployment workflow for the docs.

Changes:

• Added a multi-job CI workflow covering Python lint/security scans, backend checks, frontend lint/typecheck/build, secret scanning, and Docker build validation.
• Added an Astro Starlight docs site under docs/ with initial Getting Started, Architecture, Content Packs, and Contributing pages.
• Added a GitHub Pages workflow to build and deploy the docs site on changes under docs/**, plus updated .gitignore for Astro outputs.

Reviewed changes

Copilot reviewed 13 out of 15 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
.github/workflows/ci.yml	Adds CI pipeline for linting, testing, scanning, and build validation.
.github/workflows/deploy-docs.yml	Builds and deploys the docs site to GitHub Pages.
.gitignore	Introduces ignore rules for local/dev artifacts and Astro build outputs.
docs/package.json	Defines docs site dependencies and scripts (Astro/Starlight).
docs/package-lock.json	Locks docs site dependency versions for reproducible installs.
docs/astro.config.mjs	Configures Starlight site, GitHub Pages site/base, and sidebar.
docs/tsconfig.json	Sets strict Astro TypeScript config for docs.
docs/src/content.config.ts	Configures Starlight content collection loader/schema.
docs/src/content/docs/getting-started/introduction.md	Adds introduction documentation page.
docs/src/content/docs/getting-started/quickstart.md	Adds local + Docker quickstart instructions.
docs/src/content/docs/getting-started/configuration.md	Documents environment variables and security guidance.
docs/src/content/docs/architecture/overview.md	Describes high-level system architecture and repo layout.
docs/src/content/docs/architecture/api-reference.md	Documents REST/WebSocket endpoints (high-level).
docs/src/content/docs/content-packs/guide.md	Documents content pack structure and contribution flow.
docs/src/content/docs/contributing/guide.md	Adds contributor setup and standards guidance.

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[Copilot]

The TruffleHog GitHub Action is referenced via @main, which can introduce unreviewed breaking changes into your CI unexpectedly. Pin to a tagged release or a specific commit SHA to make the workflow deterministic and more secure.

Suggested change

	uses: trufflesecurity/trufflehog@main
	uses: trufflesecurity/trufflehog@v3.88.18

[Copilot]

For GitHub Pages project sites, Astro’s base is typically expected to include a trailing slash (e.g., /GS360/). Without it, generated asset and link URLs can be incorrect depending on how paths are joined during build. Consider switching base to /GS360/ and ensuring internal links don’t hardcode the repo name.

Suggested change

	base: "/GS360",
	base: "/GS360/",

[Copilot]

This link hardcodes the repo base path (/GS360/...). That tends to break local dev/preview where the site is served from /, and it couples content to the deployment target. Prefer a base-agnostic internal link like /content-packs/guide/ (letting Astro’s base handle the prefix) or a relative link.

Suggested change

	See the [Content Pack Guide](/GS360/content-packs/guide/) for full details.
	See the [Content Pack Guide](/content-packs/guide/) for full details.

[Copilot]

The pytest ... || echo "No test files found — skipping coverage" construct will mark the step successful for any pytest failure (including failing tests), because the echo runs on any non-zero exit code. This effectively disables backend test enforcement in CI. Prefer an explicit “no tests” check (e.g., pytest --collect-only), or fail the job on test failures while only skipping when the test discovery truly finds zero tests.

Suggested change

	pytest --tb=short --no-header -q \
	--cov=backend --cov=core \
	--cov-report=term-missing \
	--cov-report=xml:coverage.xml \
	|| echo "No test files found — skipping coverage"
	pytest --collect-only --no-header -q > /tmp/pytest-collect.txt 2>&1
	collect_status=$?
	cat /tmp/pytest-collect.txt
	if [ $collect_status -ne 0 ]; then
	exit $collect_status
	fi
	if grep -q "collected 0 items" /tmp/pytest-collect.txt; then
	echo "No test files found — skipping coverage"
	else
	pytest --tb=short --no-header -q \
	--cov=backend --cov=core \
	--cov-report=term-missing \
	--cov-report=xml:coverage.xml
	fi

[Copilot]

run_integration_checks.py and validate-pack.py are currently allowed to fail (|| true), so CI will still pass even if these checks detect regressions. The PR description lists these as part of the CI pipeline (not marked optional), so this is a mismatch; consider removing || true (or clearly documenting/renaming them as non-blocking informational checks).

[Copilot]

npm ci failures are being silenced (2>/dev/null) and then replaced with npm install, which can mask lockfile drift and make builds non-reproducible. In CI it’s usually better to rely on npm ci (and fail loudly) so the dependency graph exactly matches package-lock.json.

Suggested change

	run: npm ci --legacy-peer-deps 2>/dev/null || npm install
	run: npm ci --legacy-peer-deps