deploy

frontend/next.config.mjs

@@ -1,6 +1,11 @@
+import { dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
 const nextConfig = {
-  output: "export",
-  trailingSlash: true,
+  output: "standalone",
+  outputFileTracingRoot: __dirname,
 };
 
 export default nextConfig;

frontend/package.json

@@ -4,8 +4,8 @@
   "version": "0.1.0",
   "scripts": {
     "dev": "next dev --hostname 0.0.0.0 --port 3000",
-    "build": "next build",
-    "start": "next start"
+    "build": "next build && node prepare-standalone.mjs",
+    "start": "node start-standalone.mjs"
   },
   "dependencies": {
     "next": "^15.3.0",

frontend/prepare-standalone.mjs

@@ -0,0 +1,48 @@
+import { cpSync, existsSync, mkdirSync, readdirSync } from "node:fs";
+import { join } from "node:path";
+
+const standalone = ".next/standalone";
+const staticSource = ".next/static";
+const publicSource = "public";
+
+function copyDir(source, target) {
+  if (!existsSync(source)) {
+    return;
+  }
+  mkdirSync(target, { recursive: true });
+  cpSync(source, target, { recursive: true });
+}
+
+function serverDirs() {
+  if (!existsSync(standalone)) {
+    return [];
+  }
+  const dirs = [];
+  if (existsSync(join(standalone, "server.js"))) {
+    dirs.push(standalone);
+  }
+  for (const entry of readdirSync(standalone, { withFileTypes: true })) {
+    if (!entry.isDirectory()) {
+      continue;
+    }
+    const candidate = join(standalone, entry.name);
+    if (existsSync(join(candidate, "server.js"))) {
+      dirs.push(candidate);
+    }
+  }
+  return dirs;
+}
+
+for (const dir of serverDirs()) {
+  copyDir(staticSource, join(dir, ".next/static"));
+  copyDir(publicSource, join(dir, "public"));
+}
+
+if (!existsSync(join(standalone, "server.js"))) {
+  const nested = serverDirs().find((dir) => dir !== standalone);
+  if (nested) {
+    cpSync(nested, standalone, { recursive: true });
+    copyDir(staticSource, join(standalone, ".next/static"));
+    copyDir(publicSource, join(standalone, "public"));
+  }
+}

frontend/start-standalone.mjs

@@ -0,0 +1,23 @@
+import { spawnSync } from "node:child_process";
+import { existsSync } from "node:fs";
+
+const candidates = [
+  ".next/standalone/server.js",
+  ".next/standalone/frontend/server.js",
+];
+const server = candidates.find((path) => existsSync(path));
+
+if (!server) {
+  throw new Error("Next standalone server.js not found; run npm run build first");
+}
+
+const result = spawnSync(process.execPath, [server], {
+  stdio: "inherit",
+  env: {
+    ...process.env,
+    HOSTNAME: process.env.HOSTNAME || "127.0.0.1",
+    PORT: process.env.PORT || "3000",
+  },
+});
+
+process.exit(result.status ?? 1);