Add workflow for releasing frontend

.github/workflows/frontend-release.yml

@@ -0,0 +1,37 @@
+name: Make release of the frontend
+
+on:
+  push:
+    tags:
+      - frontend/*
+
+jobs:
+  publish-docker-image:
+    runs-on: ubuntu-latest
+    environment: release
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          flavor: latest=false
+          images: concordium/ccdscan-frontend
+          tags: type=match,pattern=frontend/(.*),group=1
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: ./frontend
+          file: ./frontend/Dockerfile
+          push: false
+          platforms: linux/amd64
+          tags: ${{ steps.meta.outputs.tag }}
+          labels: ${{ steps.meta.outputs.labels }}