Switch from standalone to standard Next.js build

Removes output: "standalone" from next.config.js, updates build/start/preview
scripts to use next build/next start, and updates Dockerfile to copy .next
output directory and run via bun run start instead of server.js.

https://claude.ai/code/session_014126WHVRT8mftmqkU6dajG

Dockerfile

@@ -23,8 +23,7 @@ ENV NODE_ENV=production \
     PORT=3000 \
     HOSTNAME=0.0.0.0
 
-COPY --from=build /usr/src/app/.next/standalone ./
-COPY --from=build /usr/src/app/.next/static ./.next/static
+COPY --from=build /usr/src/app/.next ./.next
 COPY --from=build /usr/src/app/public ./public
 COPY --from=install /usr/src/app/node_modules node_modules
 COPY --from=build /usr/src/app/package.json ./package.json
@@ -36,4 +35,4 @@ RUN chmod -R a+rX drizzle public migrate.ts
 
 USER bun
 EXPOSE 3000
-CMD ["sh", "-c", "bun migrate.ts && bun server.js"]
+CMD ["sh", "-c", "bun migrate.ts && bun run start"]

next.config.js

@@ -6,7 +6,6 @@ import "./src/env.js";
 
 /** @type {import("next").NextConfig} */
 const config = {
-  output: "standalone",
   reactCompiler: false,
   serverExternalPackages: ["pg", "better-auth"],
 };

package.json

@@ -4,7 +4,7 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "build": "next build && cp -r .next/static .next/standalone/.next/static && cp -r public .next/standalone/public",
+    "build": "next build",
     "check": "eslint . && tsc --noEmit",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "bun src/server/db/migrate.ts",
@@ -20,8 +20,8 @@
     "format:write": "prettier --write \"**/*.{ts,tsx,js,jsx,mdx}\" --cache",
     "lint": "eslint .",
     "lint:fix": "eslint --fix .",
-    "preview": "next build && node .next/standalone/server.js",
-    "start": "node .next/standalone/server.js",
+    "preview": "next build && next start",
+    "start": "next start",
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {