optimize build process for low mem

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