server.js

const express=require('express');
const app=express();
const path=require('path');

const PORT=process.env.PORT ||3000;
const cors=require('cors');

//for static files
app.use(express.static('assets'));

//for json request of email
app.use(express.json());

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

//CORS policy
const corsOptions={
    origin: process.env.ALLOWED_CLIENTS.split(',')
    //['http:localhost:8000','http:localhost:3000','http:localhost:5000']
}
app.use(cors(corsOptions));

//template engine
app.set('views', path.join(__dirname,'/views'));
app.set('view engine','ejs');

//Routes
app.use('/api/files',require('./routes/files'));
app.use('/files',require('./routes/show'));
app.use('/files/download',require('./routes/download'));

app.listen(PORT,()=>{
    console.log(`Listening on port: ${PORT}`);
})