ci: extension (gubbins) deployment

.github/workflows/deployment.yml

@@ -126,3 +126,30 @@ jobs:
           push: true
           tags: ghcr.io/diracgrid/diracx-web/static:${{ needs.release-please.outputs.tag_name }}
           platforms: linux/amd64,linux/arm64
+
+  build-deploy-gubbins-image:
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'push' && github.repository == 'DIRACGrid/diracx-web' }}
+    needs: build-deploy-library-package
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image (extension example)
+        uses: docker/build-push-action@v6
+        with:
+          context: ./packages/extensions
+          push: ${{ github.event_name == 'push' && github.repository == 'DIRACGrid/diracx-web' && github.ref_name == 'main' }}
+          tags: ghcr.io/diracgrid/diracx-web/static:extension-example
+          platforms: linux/amd64,linux/arm64

packages/extensions/Dockerfile

@@ -0,0 +1,18 @@
+# Minimize the size and complexity of the final Docker image by separating the
+# build stage and the runtime stage into two different steps
+
+# Stage 1: Build the Next.js application
+FROM node:alpine AS build
+WORKDIR /app
+# Copy the application to the working directory
+COPY . .
+# Install the project dependencies
+RUN npm ci
+# Build the static export with telemetry disabled (https://nextjs.org/telemetry)
+RUN NEXT_TELEMETRY_DISABLED=1 npm run build
+
+# Stage 2: Copy the website from the previous container to a Nginx container
+FROM nginxinc/nginx-unprivileged:alpine
+EXPOSE 8080
+COPY --from=build /app/out /usr/share/nginx/html
+COPY ./config/nginx/default.conf /etc/nginx/conf.d/default.conf