This commit introduces a new `DEPLOYMENT_CHECKLIST.md` file that outlines the necessary steps for configuring server-specific settings after pulling from Git. It includes instructions for environment files, PM2 configuration, firewall rules, database setup, and building frontends. Additionally, it adds an example `ecosystem.config.js.example` file for PM2 configuration, providing a template for users to customize for their deployment environment. The `.gitignore` file is updated to include the new PM2 ecosystem config file.
