(NOBIDS) add hotfix-workflow

.github/workflows/publish-hotfix-images.yml

@@ -0,0 +1,21 @@
+name: Publish Docker gotfix images
+
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the feature/newfrontend branch
+  push:
+    branches:
+      - hotfix
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Publish to Dockerhub Registry
+        uses: elgohr/Publish-Docker-Github-Action@master
+        with:
+          name: gobitfly/eth2-beaconchain-explorer
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          tags: "hotfix"