feat(adding_dhub_automation): Adding dhub automation (#291)

Precommit-Verified: ed3c241d3340295da3142380fbaa23def463a6febf0aac99f99a5a3ac2d6ad41

.github/workflows/docker-push.yml

@@ -0,0 +1,36 @@
+name: Build and Push Image
+on:
+  release:
+    types: [released]
+
+jobs:
+  build:
+    name: Build and push image
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Build Image
+      id: build-image
+      uses: redhat-actions/buildah-build@v2
+      with:
+        image: vmware_exporter
+        tags: latest ${{ github.sha }} ${{ github.ref }}
+        dockerfiles: |
+          ./Dockerfile
+
+    # Podman Login action (https://github.com/redhat-actions/podman-login) also be used to log in,
+    # in which case 'username' and 'password' can be omitted.
+    - name: Push To dhub
+      id: push-to-dhub
+      uses: redhat-actions/push-to-registry@v2
+      with:
+        image: ${{ steps.build-image.outputs.image }}
+        tags: ${{ steps.build-image.outputs.tags }}
+        registry: docker.io
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+    - name: Print image url
+      run: echo "Image pushed to ${{ steps.push-to-dhub.outputs.registry-paths }}"