CHORE(merge): merge from develop

- Initial setup and all features from develop branch
- Includes: auth, deploy, docker, style fixes
- K3S deployment configuration

nextjs/app/manifest.ts

@@ -0,0 +1,47 @@
+import { MetadataRoute } from 'next'
+
+export default function manifest(): MetadataRoute.Manifest {
+  return {
+    name: '제자들교회',
+    short_name: '제자들교회',
+    description: '인천 제자들교회 - 성경적 제자도를 실천하는 교회',
+    start_url: '/',
+    display: 'standalone',
+    background_color: '#ffffff',
+    theme_color: '#000000',
+    orientation: 'portrait',
+    icons: [
+      {
+        src: '/icon_black.webp',
+        sizes: 'any',
+        type: 'image/webp',
+      },
+      {
+        src: '/icon_black.webp',
+        sizes: 'any',
+        type: 'image/webp',
+        purpose: 'maskable',
+      },
+      {
+        src: '/icon_white.webp',
+        sizes: 'any',
+        type: 'image/webp',
+      },
+      {
+        src: '/icon_white.webp',
+        sizes: 'any',
+        type: 'image/webp',
+        purpose: 'maskable',
+      },
+      {
+        src: '/logo.webp',
+        sizes: 'any',
+        type: 'image/webp',
+      },
+    ],
+    categories: ['church', 'religion', 'community'],
+    lang: 'ko-KR',
+    dir: 'ltr',
+  }
+}
+