server.js

require ('dotenv').config()
const express = require('express')
const mongoose=require('mongoose')
const cors =require('cors')
const fileUpload=require('express-fileupload')
const cookieParser=require('cookie-parser')
const path=require('path')
const app=express()
app.use(express.json())
app.use(cookieParser())
app.use(cors())
app.use(fileUpload(
    {
        useTempFiles:true
    }
))

//connect to Mongo_Db
const URI=process.env.MONGODB_URL
mongoose.connect(URI,{
    useNewUrlParser: true,
    useUnifiedTopology: true,
    useCreateIndex:true,
    useFindAndModify:false
},err=>
 {
        if(err)
        throw err;
        console.log("connect to mongodb")
    })

//     app.get('/',(req,res)=>
// {
//     res.json({message:"welcome my first channel"})
// })
//Routers
app.use('/user',require('./routes/userRoutes'))
app.use('/api',require('./routes/categoryRouter'))
app.use('/api',require('./routes/upload'))
app.use('/api',require('./routes/productRouter'))
app.use('/api',require('./routes/paymentRouter'))

if(process.env.NODE_ENV === 'production'){
    app.use(express.static('cilent/build'))
    app.get("*",(req,res) =>{
        res.sendFile(path.join(__dirname,'cilent','build','index.html'))
    })
}
const PORT = process.env.PORT || 5000
    app.listen(PORT,()=>
    {
        console.log("Server  Listening")
    })