Add workflow to build Docker image on tags

.github/workflows/build-release.yml

@@ -0,0 +1,41 @@
+name: Build release
+
+on:
+  release:
+    tags:
+      - 'v*'
+    types:
+      - created
+
+jobs:
+  build-release:
+    name: Build release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create image tags
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/scicatproject/landingpageserver
+          flavor: latest=false
+          tags: |
+            type=raw,value=stable
+            type=ref,event=tag
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64/v8
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}