Update maven.yml

Author: Allen-Chen-BU

.github/workflows/maven.yml

@@ -45,10 +45,11 @@ jobs:
 
   # build a docker image and push it to Docker Hub
   deploy:
+    needs: [build]
     runs-on: ubuntu-latest
-    defaults:
-      run: 
-        working-directory: ./code/backend
+    # defaults:
+    #   run: 
+    #     working-directory: ./code/backend
     steps:
       - name: Login to Docker Hub
         uses: docker/login-action@v3
@@ -58,9 +59,12 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          context: ./code/backend
 
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
+          context: ./code/backend
           push: true
           tags: ${{ vars.DOCKERHUB_USERNAME }}/campus_exchange:latest