Merge pull request #2 from j2320/work2

MongoDBの変更

Author: j2320

bin/www

@@ -20,7 +20,7 @@ app.set("port", port);
  */
 const mongoose = require("mongoose");
 const dev_db_url =
-  "mongodb+srv://cooluser:coolpassword@cluster0.cojoign.mongodb.net/local_library?retryWrites=true&w=majority&appName=Cluster0";
+  "mongodb://localhost:27017/local_library";
 const mongoDB = process.env.MONGODB_URI || dev_db_url;
 
 try {