sever.js

process.env.NODE_TLS_REJECT_UNAUTHORIZED='0'
const { Client } = require('pg');
var express = require('express');
var bodyParser = require('body-parser');
const jwt = require('jsonwebtoken');
const client = new Client({
  connectionString: "postgres://jnllxhyrgazyey:3dc84e638e10c1ca9e7baf88149b0bfd979acbe4f0ea7dd2b02fddf6402b0273@ec2-54-226-18-238.compute-1.amazonaws.com:5432/d2m6n3gvn9u6u4",
  ssl: true,
});

client.connect();	

var myapp = express();
const path = require('path');
const router = express.Router();

myapp.use(function(req, res, next){ 
req.headers['content-type'] = "application/json"; 
next();
});

myapp.get('/', function(req, res) {
   res.sendFile( __dirname);
   res.sendFile(path.join(__dirname + '/school/home/index.html'));
});
myapp.use(express.static(__dirname + '/school/home'));
myapp.use(bodyParser.urlencoded({ extended: true }));
myapp.use(bodyParser.json());


myapp.post('/auth/signup', function (req, res) {
client.connect();	
var datae = {};
var school = {};
var name = req.body.name;
var age = req.body.age;
var classes = req.body.class;
var sex = req.body.sex;
var scores = req.body.scores;

var maId = 3;	

	
const text = "INSERT INTO School(id,name,age,class,sex,scores) VALUES('NULL', '"+ name +"', '"+ age +"', '"+ classes +"', '"+ sex +"', '"+ scores +"') RETURNING id;";

client.query(text, (err, resp) => {
if (err){
datae['status'] = 404;
datae['error'] = "Error: Problem occur when signing up...";
res.send(datae);
}else{
	
datae['status'] = 200;
 datae = {};
 name = first_name;
 age = age;
 classes = classes ;
 sex = sex;
 scores = scores; 


datae['data'] = "now you are register....";
res.send(datae);
}
});
});


const portr = process.env.PORT || 3000;

myapp.listen(portr);