push image also to GitHub Docker registry

.github/workflows/deploy.yml

@@ -112,7 +112,13 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push
+      - name: Log in to GitHub Docker Registry
+        uses: docker/login-action@v1
+        with:
+          registry: docker.pkg.github.com
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Push to Docker Hub
         uses: docker/build-push-action@v2
         with:
           context: .
@@ -121,6 +127,15 @@ jobs:
           tags: ${{ github.repository }}:latest
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache
+      - name: Push to GitHub Packages
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: docker.pkg.github.com/${{ github.repository }}:latest
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
 
   deploy:
     needs: [test, build]