Implement build script and enhance README for Link features (#12) #8

	name: Build and Push Docker Image (Main Branch)

	on:
	push:
	branches:
	- main
	workflow_dispatch:

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}
	BUILD_PLATFORMS: linux/amd64

	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v5

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Log in to Container Registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: \|
	type=raw,value=main
	type=sha,format=short

	- name: Build and push Docker image
	id: build
	uses: docker/build-push-action@v6
	with:
	context: .
	push: true
	load: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max
	platforms: ${{ env.BUILD_PLATFORMS }}

	- name: Test container health endpoint
	shell: bash
	run: \|
	set -euo pipefail
	IMAGE_TAG=$(echo "${{ steps.meta.outputs.tags }}" \| head -n 1)
	docker run -d --name link-test -p 3000:3000 "$IMAGE_TAG"
	trap 'docker rm -f link-test >/dev/null 2>&1 \|\| true' EXIT

	for attempt in $(seq 1 30); do
	if curl -fsS http://127.0.0.1:3000/api/health >/dev/null; then
	exit 0
	fi
	sleep 2
	done

	docker logs link-test
	exit 1

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