fix(ci): retry docker image build in server root path workflow

.github/workflows/test_server_root_path.yml

@@ -36,13 +36,26 @@ jobs:
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Build Docker image
-        uses: docker/build-push-action@0adf9959216b96bec444f325f1e493d4aa344497 # v6.14.0
-        with:
-          context: .
-          file: ./docker/Dockerfile.non_root
-          tags: litellm-test:${{ github.sha }}
-          load: true
-          push: false
+        run: |
+          retry() {
+            local attempt=1
+            local max_attempts=4
+            until "$@"; do
+              if [ "$attempt" -ge "$max_attempts" ]; then
+                echo "Command failed after $attempt attempts: $*"
+                return 1
+              fi
+              echo "Attempt $attempt failed: $*. Retrying in $((attempt * 15))s..."
+              sleep $((attempt * 15))
+              attempt=$((attempt + 1))
+            done
+          }
+
+          retry docker buildx build \
+            --file ./docker/Dockerfile.non_root \
+            --tag litellm-test:${{ github.sha }} \
+            --load \
+            .
 
       - name: Start LiteLLM container with SERVER_ROOT_PATH
         run: |