From 82977b6dd8f3c9f8c2dec02d4edef3290438454a Mon Sep 17 00:00:00 2001
From: Sean O'Connor <sean@soconnor.dev>
Date: Fri, 26 Jun 2026 01:25:03 -0400
Subject: [PATCH] optimize build process for low mem

---
 .dockerignore        |  2 ++
 Dockerfile           | 14 +++++++++++---
 README.md            |  2 ++
 docs/ARCHITECTURE.md |  2 +-
 next.config.js       | 17 ++++++++++++++++-
 5 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/.dockerignore b/.dockerignore
index 44820df..f9b132d 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -5,6 +5,8 @@ node_modules
 Dockerfile*
 docker-compose*
 README.md
+docs
+AGENTS.md
 *.log
 .DS_Store
 .env*
diff --git a/Dockerfile b/Dockerfile
index 9905f7d..b30892f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,9 +13,16 @@ COPY . .
 ARG NEXT_PUBLIC_APP_URL=http://localhost:3000
 ARG BETTER_AUTH_URL=http://localhost:3000
 
-ENV NODE_ENV=production \
+# Low-memory Docker build profile:
+# - disable React Compiler (saves compile RAM; prod image still runs fine without it)
+# - skip eslint/tsc inside `next build` (run `bun run check` in CI instead)
+# - cap Node heap at 2GB (raise Docker/Colima memory if this still OOMs)
+ENV DOCKER_BUILD=1 \
+    DISABLE_REACT_COMPILER=1 \
+    NODE_ENV=production \
     SKIP_ENV_VALIDATION=1 \
-    NODE_OPTIONS=--max-old-space-size=4096 \
+    NEXT_TELEMETRY_DISABLED=1 \
+    NODE_OPTIONS=--max-old-space-size=2048 \
     BETTER_AUTH_URL=${BETTER_AUTH_URL} \
     NEXT_PUBLIC_APP_URL=${NEXT_PUBLIC_APP_URL} \
     AUTH_SECRET=docker-build-placeholder-secret-do-not-use \
@@ -25,7 +32,8 @@ RUN bun run build
 FROM base AS release
 ENV NODE_ENV=production \
     PORT=3000 \
-    HOSTNAME=0.0.0.0
+    HOSTNAME=0.0.0.0 \
+    NEXT_TELEMETRY_DISABLED=1
 
 COPY --from=build /usr/src/app/.next ./.next
 COPY --from=build /usr/src/app/public ./public
diff --git a/README.md b/README.md
index 3b9c7c9..5cf99a2 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,8 @@ The production compose file runs the Next.js app and PostgreSQL.
 
 **Container startup** runs `bun migrate.ts && bun run start` (see `Dockerfile`). Drizzle only applies **pending** migrations — safe to run on every restart; already-applied migrations are skipped.
 
+The Docker **build** uses a low-memory profile (React Compiler off, webpack memory optimizations, 2GB Node heap cap). Give Docker/Colima at least **3–4GB RAM** for builds. If it still OOMs, raise VM memory (`colima start --memory 6`) — avoid `--no-cache` unless debugging.
+
 ### 1. Configure
 
 ```bash
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 55df6f0..40c3ffc 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -186,7 +186,7 @@ Validated in `src/env.js`. See `.env.example`.
 | `docker-compose.yml` | Deploy: `app` + `db` (Postgres internal); copy `.env.example` → `.env` |
 | `docker-compose.dev.yml` | Local dev: Postgres only, port `${POSTGRES_PORT:-5432}` |
 
-App image built from `Dockerfile`. Container `CMD`: `bun migrate.ts && bun run start` (migrations then `next start` on port 3000).
+App image built from `Dockerfile`. Container `CMD`: `bun migrate.ts && bun run start` (migrations then `next start` on port 3000). Docker builds disable React Compiler and use `experimental.webpackMemoryOptimizations` to reduce peak RAM.
 
 Set `BETTER_AUTH_URL` and `NEXT_PUBLIC_APP_URL` to the public hostname before deploy. Rebuild the image when changing `NEXT_PUBLIC_*` build-time vars.
 
diff --git a/next.config.js b/next.config.js
index 42f7609..5a46c89 100644
--- a/next.config.js
+++ b/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;