diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index dd7a52c..4d231be 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -21,6 +21,8 @@ FROM node:22-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
+# Cap node heap so a build on a small VPS can't OOM-kill neighbours.
+ENV NODE_OPTIONS=--max-old-space-size=1536
 RUN corepack enable && pnpm build
 
 # Production: Hono serves dist/ + /api/copilotkit on port 3000
@@ -34,4 +36,4 @@ COPY server.ts package.json ./
 EXPOSE 3000
 HEALTHCHECK --interval=30s --timeout=3s --retries=3 \
   CMD wget -qO- http://127.0.0.1:3000/api/health || exit 1
-CMD ["sh", "-c", "corepack enable && tsx server.ts"]
+CMD ["./node_modules/.bin/tsx", "server.ts"]