adding forgotten dockerhub login step

Author: alpae

.github/workflows/docker-image.yml

@@ -60,6 +60,14 @@ jobs:
         run: |
           docker run --rm ${{ env.TEST_TAG }}
 
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request' && github.event_name != 'push'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
       -
         name: Build and push
         uses: docker/build-push-action@v3