refactor. db update -> db connection after db update

@@ -13,14 +13,14 @@ const app = new Koa();
 const router = new Router();
 
 
-updateMedicineInfo.updateMedicineInfo();
-
 Mongoose.connect(MONGO_URL, {
+    useFindAndModify : false,
     useNewUrlParser : true,
     useUnifiedTopology: true,
     useCreateIndex : true
 }).then(() => {
     console.log('Mongo DB is connected : ', MONGO_URL);
+    updateMedicineInfo.updateMedicineInfo();
 }).catch(e => {
     console.log(e, error);
 })

@@ -15,5 +15,8 @@
     "IoT"
   ],
   "author": "박권수",
-  "license": "ISC"
+  "license": "ISC",
+  "dependencies": {
+    "mqtt": "^4.2.6"
+  }
 }