src/renderer/index.js

@@ -66,6 +66,11 @@ document.addEventListener('dragover', event => {
 document.addEventListener('drop', event => {
   event.preventDefault();
 });
+document.addEventListener('keydown', event =>  {
+  event.preventDefault();
+  if (event.ctrlKey && event.keyCode === 81)
+  remote.app.quit();
+});
 document.addEventListener('click', event => {
   let { target } = event;
   while (target && target !== document) {