Add workflow to build and push image

Author: samdoran

.github/workflows/build-and-push.yaml

@@ -0,0 +1,39 @@
+name: Build and push container image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-push:
+    name: Build and push
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/[email protected]
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Quay.io
+        uses: docker/login-action@v3
+        with:
+          registry: quay.io
+          username: ${{ secrets.QUAY_USER }}
+          password: ${{ secrets.QUAY_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: Containerfile
+          platforms: linux/arm64,linux/amd64
+          provenance: false
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: |
+            quay.io/${{ github.repository }}:latest
+            quay.io/${{ github.repository }}:${{ github.ref_name }}