$ man configuration-files

Configuration Files

Files that define how tools should behave.

by Shawn Tenam

next.config.ts tells Next.js how to build. tsconfig.json tells TypeScript how to compile. .gitignore tells Git what to ignore. Config files control behavior without code changes.

Read the docs for each tool. Copy starter configs. Tweak settings as needed. Commit config files to Git so everyone uses the same setup.