index.js

//import koa  
var Koa = require('koa');
const cors = require('@koa/cors');

//import all the routes  
var login = require('./routes/login.js');
var signup = require('./routes/signup.js')
var comments = require('./routes/comments.js')
var activities = require('./routes/activities.js');
var tags = require('./routes/tags.js');

//create a koa instance and store it in app variable   
var app = new Koa();
app.use(cors());

////apply the routes as a middleware
app.use(login.routes());
app.use(signup.routes());
app.use(comments.routes());
app.use(activities.routes());
app.use(tags.routes());


//if there is no environment variable set for port number
//use a default value of 8080
var port = process.env.PORT || 8080;
//run the server on port 8080


app.listen(port);
console.log(`listening on port ${port}`);