fix: ensure app is initialized even when config fails to load

This makes sure that the notification popups are working and can
inform the user about the potential syntax error in the config file.

scripts/index.js

@@ -18,8 +18,8 @@ If you are running TileBoard for the first time, please rename "config.example.j
    if (!window.CONFIG) {
       alert(`The "${configName}.js" configuration file has loaded but window.CONFIG is not defined!
 Please make sure that it defines a CONFIG variable with proper configuration.`);
-      return;
    }
+   // Initialize the app even though we have no valid configuration so that notifications are working.
    // @ts-ignore
    window.window.initApp();
 }

scripts/init.js

@@ -22,6 +22,10 @@ window.initApp = function () {
          requireBase: false,
       });
 
+      if (!window.CONFIG) {
+         return;
+      }
+
       ApiProvider.setInitOptions({
          wsUrl: window.CONFIG.wsUrl,
          authToken: window.CONFIG.authToken,

scripts/models/api.js

@@ -52,6 +52,11 @@ App.provider('Api', function () {
       $Api.prototype._init = function () {
          const self = this;
 
+         if (!self._url) {
+            console.info('Skipping API service initialization since no API URL was provided.');
+            return;
+         }
+
          this._getToken().then(function (token) {
             if (token) {
                self._token = token.access_token;