Add Docker Hub image push to Github CI

.github/workflows/update-image.yml

@@ -17,7 +17,7 @@ jobs:
         run: echo "::set-output name=tag::$(awk -F "=" '/MONERO_BRANCH=/ {print $2}' Dockerfile)"
 
       # Build and push the repo.
-      - name: "Build and Push"
+      - name: "Build and Push Docker images to Github Packages"
         uses: docker/build-push-action@v1
         with:
           username: ${{ github.actor }}
@@ -25,4 +25,13 @@ jobs:
           registry: docker.pkg.github.com
           repository: ${{ github.repository }}/simple-monerod
           tags: latest, ${{ steps.get_tag.outputs.tag }}
+          add_git_labels: true
+      
+      - name: "Build and push Docker images to Docker Hub"
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          repository: sethsimmons/simple-monerod
+          tags: latest, ${{ steps.get_tag.outputs.tag }}
           add_git_labels: true