fix: update docker-compose paths for backend and frontend services

docker-compose.yml

@@ -3,15 +3,15 @@ version: "3.9"
 services:
   backend:
     build:
-      context: .
-      dockerfile: backend/Dockerfile
+      context: ./backend
+      dockerfile: Dockerfile
     container_name: my-backend
     restart: unless-stopped
 
   frontend:
     build:
-      context: .
-      dockerfile: frontend/Dockerfile
+      context: ./frontend
+      dockerfile: Dockerfile
     container_name: my-frontend
     ports:
       - "6080:80"