Build on tag creation

.github/workflows/build-release.yaml

@@ -0,0 +1,36 @@
+name: Build on creation of a new tag
+on:
+  create:
+    tags:
+      - v*
+jobs:
+  build-master:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.CR_PAT }}
+      -
+        name: Get the version
+        id: get_version
+        run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
+      -
+        name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ghcr.io/benjamin-maynard/kubernetes-cloud-mysql-backup:${{ steps.get_version.outputs.VERSION }}