index.js

var express = require("express");
var mongoose = require('mongoose');
var bodyParser = require('body-parser');
var path = require('path');
var app = express();

var collegeRouter = require('./routes/collegeRouter');
var studentRouter = require('./routes/studentRouter');

app.get('/', function(req,res){
  res.sendFile(path.join(__dirname+'/public/index.html'));
});

app.use(bodyParser.json());
app.use(bodyParser.urlencoded());


app.use('/api/colleges', collegeRouter);
app.use('/api/students', studentRouter);
app.use(express.static(path.join(__dirname,'public')));

mongoose.connect("mongodb://localhost/mydb",{
    useNewUrlParser: true
})
   .then(function(){
     console.log("database connected");
   })
    .catch(function(err){
      console.log("could not connect to database")
    });


const PORT = 3000;
app.listen(PORT, function() {
  console.log("Server running on port : " + PORT);
});