fix: exclude dotfiles (.gitignore, .nojekyll) from PWA precache manifest

https://cli.vuejs.org/core-plugins/pwa.html#configuration
https://developer.chrome.com/docs/workbox/modules/workbox-build?hl=zh-cn#type-GlobPartial

src/utils/defaults.js

@@ -327,5 +327,10 @@ module.exports = {
       maskIcon: './web-icons/dashy-logo.png',
       msTileImage: './web-icons/dashy-logo.png',
     },
+    workboxOptions: {
+      globIgnores: [
+        '**/.*', // Ignore dotfiles
+      ],
+    },
   },
 };