feat: enhance SSR routing and development experience

- Updated the SSR routing to conditionally load development and production handlers based on the NODE_ENV variable.
- Introduced a new dev.ts file to handle requests in development mode, including asset proxying and HTML response generation.
- Removed the not-found.tsx file and streamlined the photoId route logic for better maintainability.
- Added support for Open Graph and Twitter meta tags in the production handler for improved SEO.
- Updated README with new S3 endpoint configuration.

Signed-off-by: Innei <tukon479@gmail.com>

apps/ssr/package.json

@@ -12,7 +12,7 @@
     "build:jpg": "node scripts/webp-to-jpg.js",
     "build:next": "next build",
     "deploy": "npm run pages:build && wrangler pages deploy",
-    "dev": "next dev",
+    "dev": "next dev --turbo --port 1975",
     "pages:build": "pnpm dlx @cloudflare/next-on-pages",
     "preview": "npm run pages:build && wrangler pages dev",
     "start": "next start"