update app yaml add fake worker

app.yaml

@@ -1,11 +1,16 @@
 runtime: go
-version: 1
 api_version: go1
 threadsafe: true
 
+skip_files:
+- ^node_modules$
+- ^\.idea$
+
 handlers:
 - url: /service-worker.js
-
+  static_files: public/service-worker.js
+  upload: public/service-worker.js
+  secure: always
 
 - url: /.*
   script: _go_app

public/service-worker.js

@@ -0,0 +1,10 @@
+self.addEventListener('install', function (event) {
+  event.waitUntil(self.skipWaiting())
+});
+
+self.addEventListener('activate', function (event) {
+  // `claim()` sets this worker as the active worker for all clients that
+  // match the workers scope and triggers an `oncontrollerchange` event for
+  // the clients.
+  return self.clients.claim();
+});