Update maven.yml

Author: Allen-Chen-BU

.github/workflows/maven.yml

@@ -47,9 +47,7 @@ jobs:
   deploy:
     needs: [build]
     runs-on: ubuntu-latest
-    # defaults:
-    #   run: 
-    #     working-directory: ./code/backend
+    
     steps:
       - name: Login to Docker Hub
         uses: docker/login-action@v3
@@ -63,6 +61,7 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
-          context: ./code/backend
+          context: ./code
+          file: code/backend/Dockerfile
           push: true
-          tags: ${{ vars.DOCKERHUB_USERNAME }}/campus_exchange:latest
+          tags: campus_exchange:latest