add todo-network to mongo container

docker-compose.yml

@@ -20,6 +20,8 @@ services:
     # virtual drive for storage of the db between reboots
     volumes:
       - ./data/db:/data/db
+    networks:
+      - todo-network
 
   # backend stuff
   backend:

src/main/java/com/cloudcomputing/todo/controller/FallbackController.java

 package com.cloudcomputing.todo.controller;
 
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 
 @Controller