server.js

const express = require('express')
const errorHandler = require('./middleware/error');
const mongoSanitize = require('express-mongo-sanitize');
const xss = require('xss-clean')
const cors = require('cors');
const hpp = require('hpp');
const fileUpload = require('express-fileupload');
const rateLimit = require('express-rate-limit');
// load env variables
let envPath;

if(process.env.NODE_ENV == 'prod')
    envPath = './prod.env';
else
    envPath = './dev.env';

require('dotenv').config({path: envPath});
const path = require('path');
const helmet = require('helmet');
const apiRouter = require('./api');

// Import DB
const connectDB = require('./config/db');
connectDB();
require('colors');

const app = express();

// Body Parser
app.use(express.json());
// sanitize Data
app.use(mongoSanitize());
// xss-clean
app.use(xss());
// helmet
app.use(helmet({
    contentSecurityPolicy: false,

}));
//rate-limit
const limiter = rateLimit({
    windowMs: 60 * 1000, // 1 minutes
    max: 10000, // limit each IP to 1000 requests per windowMs
});
app.use(limiter);
// hpp
app.use(hpp());
// cors
app.use(cors());
app.options('*', cors());
// file Upload
app.use(fileUpload());

const options = {
    dotfiles: 'ignore',
    etag: false,
    extensions: ['htm', 'html'],
    maxAge: '1d',
    redirect: false,
    setHeaders: function (res, path, stat) {
        res.set('x-timestamp', Date.now());
    },
};
app.use(express.static(path.join(__dirname, './public'), options));

// Use Routes
app.use('/api/v1/', apiRouter);

const root = require('path').join(__dirname, 'public', 'build')
app.use(express.static(root));
app.get("*", (req, res) => {
    res.sendFile('index.html', { root });
})

app.use(errorHandler);

const PORT = process.env.PORT || 5000;
app.listen(PORT, console.log(`Server running on port ${PORT}`.yellow.bold));

// Handle unhandled promise rejections
process.on('unhandledRejection', (err, promise) => {
    console.log(`Error: ${err.message}`.red);
    // Close server & exit process
    // server.close(() => process.exit(1));
});


module.exports = app;