In Next.js and similar modern frameworks, the .env.local.production file is used to store local overrides
Process Environment Variables (Variables set directly on the server/terminal) .env.local.production
Explicitly ignore it. In your .gitignore, write: In Next
for production environment variables when running your application in a production-like state locally (e.g., via next build && next start In Next.js and similar modern frameworks
Purpose: Use this file to define variables that should only exist on your production server (like live API keys) while allowing developers to use different keys in .env.development or .env.local.
.env.env.production.env.local.env.production.local (Highest priority)