Merge pull request #210 from blockchain-etl/feature/publish_to_docker…

…hub_workflow

Add publish-to-dockerhub.yml

.github/workflows/publish-to-dockerhub.yml

@@ -0,0 +1,21 @@
+name: Publish DockerHub
+
+on:
+  push:
+    tags:
+       - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@master
+      - name: Publish to DockerHub
+        if: startsWith(github.event.ref, 'refs/tags/v')
+        uses: elgohr/Publish-Docker-Github-Action@master
+        with:
+          name: blockchainetl/ethereum-etl
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          tags: "latest"
+          tag_semver: true