fix(pwa): point manifest icons to existing assets

Author: oiahoon

public/manifest.json

@@ -11,49 +11,13 @@
   "lang": "zh-CN",
   "icons": [
     {
-      "src": "/icons/icon-72x72.png",
-      "sizes": "72x72",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-96x96.png",
-      "sizes": "96x96",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-128x128.png",
+      "src": "/icons/128.png",
       "sizes": "128x128",
       "type": "image/png",
       "purpose": "maskable any"
     },
     {
-      "src": "/icons/icon-144x144.png",
-      "sizes": "144x144",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-152x152.png",
-      "sizes": "152x152",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-192x192.png",
-      "sizes": "192x192",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-384x384.png",
-      "sizes": "384x384",
-      "type": "image/png",
-      "purpose": "maskable any"
-    },
-    {
-      "src": "/icons/icon-512x512.png",
+      "src": "/icons/512.png",
       "sizes": "512x512",
       "type": "image/png",
       "purpose": "maskable any"