Add a prompt explaining the situation as well as documentation

src/web/pug.js

@@ -36,6 +36,9 @@ function getBaseUrl(res) {
  * Renders and serves a pug template
  */
 function sendPug(res, view, locals) {
+    if (!locals) {
+        locals = {};
+    }
     locals.loggedIn = locals.loggedIn || !!res.user;
     locals.loginName = locals.loginName || res.user ? res.user.name : false;
     locals.superadmin = locals.superadmin || res.user ? res.user.global_rank >= 255 : false;

src/web/routes/google_drive_userscript.js

@@ -0,0 +1,7 @@
+import { sendPug } from '../pug';
+
+export default function initialize(app) {
+    app.get('/google_drive_userscript', (req, res) => {
+        return sendPug(res, 'google_drive_userscript')
+    });
+}

src/web/webserver.js

@@ -177,6 +177,7 @@ module.exports = {
         require('./account').init(app);
         require('./acp').init(app);
         require('../google2vtt').attach(app);
+        require('./routes/google_drive_userscript')(app);
         app.use(serveStatic(path.join(__dirname, '..', '..', 'www'), {
             maxAge: webConfig.getCacheTTL()
         }));