adding basic user controller and model as well as updating user route

api/app.js

@@ -1,10 +1,12 @@
 
 import cookieParser from 'cookie-parser';
+import cors from 'cors';
 import express from 'express';
 import createError from 'http-errors';
 import logger from 'morgan';
 import path from 'path';
 import { fileURLToPath } from 'url';
+import xss from 'xss-clean';
 
 import indexRouter from './routes/index.js';
 import usersRouter from './routes/users.js';
@@ -18,14 +20,20 @@ const app = express();
 app.set('views', path.join(__dirname, 'views'));
 app.set('view engine', 'jade');
 
+app.use(cors());
+app.options('*', cors());
+
 app.use(logger('dev'));
 app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
 app.use(cookieParser());
 app.use(express.static(path.join(__dirname, 'public')));
+// Data sanitization against XSS
+app.use(xss());
 
 app.use('/', indexRouter);
-app.use('/users', usersRouter);
+app.use('/api/v1/users', usersRouter);
+// app.use('/api/v1/posts', usersRouter);
 
 // catch 404 and forward to error handler
 app.use(function(req, res, next) {