Node thing

const express = require('express');
const fs = require("fs")

const app = express();

var bodyParser = require("body-parser")

app.use(bodyParser.urlencoded({extended:false}));
app.use(bodyParser.json())

app.get('/', (req, res) => {
  res.send(fs.readFileSync("test.txt",{"encoding":"utf-8"}))
});

app.post("/", function(req, res){
    fs.appendFile("test.txt",req.body)

    res.writeHead(200, {'Content-Type': 'text'});
    res.end('thanks');
})

app.listen(3000, () => {
  console.log('server started');
});