修改 Dockerfile，解决构建时错误

next.config.ts

@@ -1,18 +1,7 @@
 import type { NextConfig } from "next"
 
 const nextConfig: NextConfig = {
-  poweredByHeader: false,
-  reactStrictMode: true,
-  swcMinify: true,
   output: "standalone",
-  images: {
-    minimumCacheTTL: 60,
-    formats: ["image/webp"],
-  },
-  experimental: {
-    optimizeCss: true,
-    serverComponentsExternalPackages: [],
-  },
 }
 
 export default nextConfig