koa static - Tuong-Nguyen/JavaScript-Structure GitHub Wiki
koa-static (https://github.com/koajs/static): file serving middleware
const serve = require('koa-static');
const Koa = require('koa');
const app = new Koa();
// $ GET /package.json
app.use(serve('.'));
// $ GET /hello.txt
app.use(serve('test/fixtures'));
// or use absolute paths
app.use(serve(__dirname + '/test/fixtures'));
app.listen(3000);
console.log('listening on port 3000');