pls work

.dockerignore

 node_modules
-npm-debug.log
+npm-debug.log
\ No newline at end of file

docker-compose.yaml

 version: '3'
 services:
-  todoapp:
-    container_name: todoapp
+  todoapp1:
+    container_name: todoapp1
     restart: always
     build: ./
     volumes:
@@ -14,6 +14,20 @@ services:
       - NODE_ENV=development
       - PORT=3000
   
+  todoapp2:
+    container_name: todoapp2
+    restart: always
+    build: ./
+    volumes:
+      - ./:/var/www/todoapp
+    links:
+      - mongo
+    ports:
+      - 3001:3000
+    environment:
+      - NODE_ENV=development
+      - PORT=3000
+  
   mongo:
     image: mongo
     container_name: mongo