app.js

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const postRoutes = require('./routes/posts');

const app = express();

mongoose.connect("mongodb+srv://sabyasachig:hiap5rPTwZkzuuyn@cluster0-43nw6.mongodb.net/node-angular?retryWrites=true&w=majority")
  .then(() => {
    console.log('Connected to database');
  }).catch(() => {
    console.log('Connection failed');
  });

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

app.use((req,res,next) => {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader("Access-Control-Allow-Headers",
    "Origin, X-Requestd-With, Content-Type, Accept");
  res.setHeader(
    "Access-Control-Allow-Methods",
    "GET, POST, PUT, PATCH, DELETE, OPTIONS"
  );
  next();
});

app.use('/api/posts', postRoutes);

module.exports = app;