Enable Docker Hub login to reduce hitting rate limit

.github/workflows/docker.yml

@@ -89,6 +89,15 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Login to Docker Hub to increase rate limit on pulls
+        # https://github.com/docker/login-action?tab=readme-ov-file#dockerhub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ vars.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+        # worst case of this failing is running into Docker Hub rate limit
+        continue-on-error: true
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3