docker image and build action

.gitea/workflows/build-and-publish.yml

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+name: Build and Publish
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+
+env:
+  REGISTRY: git.atlashorizon.net
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      # ACTION_TOKEN is a personal access token with package read/write scope,
+      # stored as a runner secret (the automatic GITEA_TOKEN doesn't work for
+      # registry auth on this instance).
+      - name: Log in to Gitea container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.ACTION_TOKEN }}
+
+      - name: Extract image metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=sha
+          labels: |
+            org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+      # Links the container package to this repository so it shows up on the
+      # repo's Packages tab. Returns an error if it's already linked, which is
+      # fine — hence the fallback message instead of failing the job.
+      - name: Link package to repository
+        run: |
+          curl -sf -X POST \
+            -H "Authorization: token ${{ secrets.ACTION_TOKEN }}" \
+            "${{ github.server_url }}/api/v1/packages/${{ github.repository_owner }}/container/${{ github.event.repository.name }}/-/link/${{ github.event.repository.name }}" \
+            && echo "Package linked to repository" \
+            || echo "Link skipped (already linked, or token lacks permission)"

Dockerfile

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+FROM node:22-alpine AS build
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+# Runtime stage: serve the built app with Express
+FROM node:22-alpine
+WORKDIR /app
+ENV NODE_ENV=production
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+COPY server.js ./
+COPY --from=build /app/dist ./dist
+EXPOSE 3000
+USER node
+CMD ["node", "server.js"]