Included the default serviceworker, updated the manifest, Add the default offline page, updated the unit test, Redme

pwa/app_settings.py

@@ -3,8 +3,7 @@ from django.conf import settings
 import os
 
 # Path to the service worker implementation.  Default implementation is empty.
-PWA_SERVICE_WORKER_PATH = getattr(settings, 'PWA_SERVICE_WORKER_PATH',
-                                  os.path.join(os.path.abspath(os.path.dirname(__file__)), 'templates', 'serviceworker.js'))
+PWA_SERVICE_WORKER_PATH = getattr(settings, 'PWA_SERVICE_WORKER_PATH', 'serviceworker.js')
 
 # App parameters to include in manifest.json and appropriate meta tags
 PWA_APP_NAME = getattr(settings, 'PWA_APP_NAME', 'MyApp')
@@ -15,10 +14,39 @@ PWA_APP_BACKGROUND_COLOR = getattr(settings, 'PWA_APP_BACKGROUND_COLOR', '#fff')
 PWA_APP_DISPLAY = getattr(settings, 'PWA_APP_DISPLAY', 'standalone')
 PWA_APP_ORIENTATION = getattr(settings, 'PWA_APP_ORIENTATION', 'any')
 PWA_APP_START_URL = getattr(settings, 'PWA_APP_START_URL', '/')
+PWA_APP_FETCH_URL = getattr(settings, 'PWA_APP_FETCH_URL', '/')
 PWA_APP_ICONS = getattr(settings, 'PWA_APP_ICONS', [
     {
-        'src': '/',
-        'sizes': '160x160'
+        'src': '/static/images/icons/icon-72x72.png',
+        'sizes': '72x72'
+    },
+    {
+        'src': '/static/images/icons/icon-96x96.png',
+        'sizes': '96x96'
+    },
+    {
+        'src': '/static/images/icons/icon-128x128.png',
+        'sizes': '128x128'
+    },
+    {
+        'src': '/static/images/icons/icon-144x144.png',
+        'sizes': '144x144'
+    },
+    {
+        'src': '/static/images/icons/icon-152x152.png',
+        'sizes': '152x152'
+    },
+    {
+        'src': '/static/images/icons/icon-192x192.png',
+        'sizes': '192x192'
+    },
+    {
+        'src': '/static/images/icons/icon-384x384.png',
+        'sizes': '384x384'
+    },
+    {
+        'src': '/static/images/icons/icon-512x512.png',
+        'sizes': '512x512'
     }
 ])
 PWA_APP_DIR = getattr(settings, 'PWA_APP_DIR', 'auto')