Switched to export default exports

ref #4

src/app.ts

@@ -5,6 +5,7 @@ import * as jwt from 'jsonwebtoken';
 import { createConnection } from 'typeorm';
 import 'reflect-metadata';
 import { router as routerMain } from './routes/index';
+import routerMain from './routes/index';
 // const loaders = require('./loaders');
 import * as loaders from './loaders/index';