Production-settings -

A Docker container runs a Node.js app. The developer forgets to set --max-old-space-size . The app runs fine for 6 hours, then crashes with FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed . Fix: Always cap memory in production-settings to 80% of the container limit.

Implement a "health check" during the boot sequence that verifies all required environment variables exist, all dependent services are reachable, and disk space is sufficient. Treat your production-settings as immutable artifacts. Changing a setting on a live server via vi or Notepad is dangerous. Those changes are ephemeral, untracked, and will vanish when the server restarts. production-settings

Externalize all variable production-settings. Use environment variables (e.g., DATABASE_URL , REDIS_HOST ) or secret management tools (HashiCorp Vault, AWS Secrets Manager, Azure Key Vault). The codebase should read from the environment at runtime. A Docker container runs a Node