API calls - added json-server, db.json to mock api calls

package.json

@@ -18,6 +18,7 @@
   },
   "homepage": "https://github.com/senaduka/amras-zadatak1#readme",
   "devDependencies": {
+    "json-server": "^0.12.1",
     "nodemon": "^1.15.0"
   },
   "dependencies": {

server.js

@@ -1,21 +1,32 @@
-var express = require('express'),
-app = express(),
-port = process.env.PORT || 3000,
-mongoose = require('mongoose'),
-Group = require('./api/models/groupModel'),
-Permission = require('./api/models/permissionModel'),
-User = require('./api/models/userModel'), //created model loading here
-bodyParser = require('body-parser');
+// var express = require('express'),
+// app = express(),
+// port = process.env.PORT || 3000,
+// mongoose = require('mongoose'),
+// Group = require('./api/models/groupModel'),
+// Permission = require('./api/models/permissionModel'),
+// User = require('./api/models/userModel'), //created model loading here
+// bodyParser = require('body-parser');
   
-// mongoose instance connection url connection
-mongoose.Promise = global.Promise;
-mongoose.connect('mongodb://localhost/Userdb'); 
+// // mongoose instance connection url connection
+// mongoose.Promise = global.Promise;
+// mongoose.connect('mongodb://localhost/Userdb'); 
 
-app.use(bodyParser.urlencoded({ extended: true }));
-app.use(bodyParser.json());
+// app.use(bodyParser.urlencoded({ extended: true }));
+// app.use(bodyParser.json());
 
-var routes = require('./api/routes/userRoutes'); //importing route
-routes(app); //register the route
-app.listen(port);
+// var routes = require('./api/routes/userRoutes'); //importing route
+// routes(app); //register the route
+// app.listen(port);
 
-console.log('API server started on: ' + port);
+// console.log('API server started on: ' + port);
+
+const jsonServer = require('json-server');
+const server = jsonServer.create();
+const router = jsonServer.router('db.json');
+const middlewares = jsonServer.defaults();
+
+server.use(middlewares);
+server.use(router);
+server.listen(3000, () => {
+  console.log('JSON Server is running');
+});