# Shared-server build safety

- Keep Coolify server concurrent builds at **1** (previously 2).
- Do not run manual Docker builds on the production VM alongside deployments.
  Validate locally first; then push once and let the webhook build finish.
- The Docker builder caps Next page-generation workers and Rayon/libuv pools at
  two. Node subprocesses have a 1536 MiB old-space ceiling. These are not a hard
  total-memory limit: Bun, native allocations, and separate processes add overhead.
- Build controls are restricted to the builder stage; application runtime is
  unchanged. The final image must pass the Sharp WebP smoke test.
- If memory pressure remains high, move builds to a separate builder rather than
  increasing concurrency or running more diagnostic builds on the live VM.