Remove SIGINT handler and only listen upon server start

server.js

@@ -63,16 +63,10 @@ app.use((err, req, res, next) => {
 
 // Start app
 const port = process.env.PORT || 8080;
-const server = app.listen(port);
-console.log('Listening on port ' + port + '...\n');
-
-// Handle sigint
-process.on('SIGINT', () => {
-    console.log('Shutting down...');
-    process.exit(0);
+const server = app.listen(port, () => {
+    console.log('Listening on port ' + port + '...\n');
 });
 
 // Expose app
-exports.db = db;
-exports.server = server;
-exports.app = app;
+module.exports.app = app;
+module.exports.server = server;