ci(github): fix dockerhub auth

.github/workflows/push.yml

@@ -6,7 +6,7 @@ on:
 env:
   BACKEND_IMAGE_NAME: contribution-api
   DEMO_IMAGE_NAME: gradio
-  DOCKERHUB_USER: quackai
+  DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
 
 jobs:
   docker:
@@ -34,14 +34,18 @@ jobs:
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
-          username: $DOCKERHUB_USER
-          password: ${{ secrets.DOCKERHUB_PW }}
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Push to hub
         run: |
           docker push $DOCKERHUB_USER/$BACKEND_IMAGE_NAME:latest
           docker push $DOCKERHUB_USER/$DEMO_IMAGE_NAME:latest
-      - name: Log in to GitHub container registry
-        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Push to container registry
         run: |
           IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$BACKEND_IMAGE_NAME