refactor: serve static frontend with Go APIs

next.config.ts

@@ -1,16 +1,13 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
+  output: "export",
   // Keep dev artifacts separate from production builds. Running `next build`
   // while a dev server is alive must not invalidate the dev server's chunks.
   distDir: process.env.NODE_ENV === "development" ? ".next-dev" : ".next",
   devIndicators: false,
-  experimental: {
-    serverActions: {
-      bodySizeLimit: "12mb"
-    }
-  },
   images: {
+    unoptimized: true,
     remotePatterns: [
       { protocol: "https", hostname: "**" },
       { protocol: "http", hostname: "127.0.0.1" },