Add a GitHub Action to build and push container images

Signed-off-by: Siteshwar Vashisht <svashisht@redhat.com>

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

@@ -0,0 +1,20 @@
+# https://github.com/sclorg/build-and-push-action
+name: Build and push to quay.io registry
+on:
+  push:
+    branches:
+      - main
+jobs:
+  build-and-push:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Build and push to quay.io registry
+        uses: sclorg/build-and-push-action@v2
+        with:
+          registry: "quay.io"
+          registry_namespace: "openscanhub-fedora-infra"
+          registry_username: ${{ secrets.REGISTRY_LOGIN }}
+          registry_token: ${{ secrets.REGISTRY_TOKEN }}
+          dockerfile: "containers/hub.Containerfile"
+          image_name: "ocp"
+          tag: "staging"