optimize build process for low mem

next.config.js

@@ -4,10 +4,25 @@
  */
 import "./src/env.js";
 
+const isDockerBuild = process.env.DOCKER_BUILD === "1";
+const disableReactCompiler = process.env.DISABLE_REACT_COMPILER === "1";
+
 /** @type {import("next").NextConfig} */
 const config = {
-  reactCompiler: true,
+  // React Compiler is helpful in dev/prod but adds compile-time memory pressure in Docker builds.
+  reactCompiler: !disableReactCompiler,
+  productionBrowserSourceMaps: false,
   serverExternalPackages: ["pg", "better-auth"],
+  experimental: {
+    webpackMemoryOptimizations: true,
+  },
+  // Skip duplicate typecheck/eslint during Docker `next build` to lower peak memory.
+  ...(isDockerBuild
+    ? {
+        typescript: { ignoreBuildErrors: true },
+        eslint: { ignoreDuringBuilds: true },
+      }
+    : {}),
 };
 
 export default config;