Add workflow to publish to GHCR

.github/workflows/ghcr.yml

@@ -0,0 +1,47 @@
+name: GHCR
+
+on: push
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    strategy:
+      matrix:
+        image: [nginx, service]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+          submodules: recursive
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/central-${{ matrix.image }}
+
+      - name: Build and push ${{ matrix.image }} Docker image
+        uses: docker/build-push-action@v5
+        with:
+            file: ${{ matrix.image }}.dockerfile
+            context: .
+            push: true
+            tags: ${{ steps.meta.outputs.tags }}
+            labels: ${{ steps.meta.outputs.labels }}