fix: Use fully qualified Docker image names in workflow

Author: Varnit01-dev

.github/workflows/ci.yml

@@ -49,6 +49,8 @@ jobs:
       with:
         context: .
         push: true
-        tags: ${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:latest,${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:${{ github.sha }}
+        tags: |
+          docker.io/${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:latest
+          docker.io/${{ secrets.DOCKERHUB_USERNAME }}/go_webapp:${{ github.sha }}
         cache-from: type=gha
         cache-to: type=gha,mode=max