.env.local.production -

| File Naming Strategy | Primary Purpose | Should be committed to Git? | Loads for... | | :--- | :--- | :--- | :--- | | | Base configuration, default values for all environments. | No (ideally, often committed as a template .env.example ). | All environments. | | .env.local | Local overrides for your specific machine. | Never. Always add to .gitignore . | All environments. | | .env.development | Settings for the development environment (e.g., local API endpoints). | Yes (as a template). | npm run dev , next dev . | | .env.production | Default settings for the production environment (e.g., live API endpoints). | Yes (as a template). | npm run build , next start . | | .env.development.local | Highest priority overrides specific to your local development environment. | Never. | npm run dev . | | .env.production.local | Highest priority overrides for testing a production build locally. | Never. | npm run build , next start . | | .env.test | Settings for the testing environment. | Yes (as a template). | npm run test . |

: Specifies that these variables are only loaded when NODE_ENV is explicitly set to production (usually during npm run build or npm start ). .env.local.production

The single most common use case for .env.local.production is testing your production build locally before pushing it to a live server. | File Naming Strategy | Primary Purpose |

For example, in a Next.js project, you might have: | No (ideally, often committed as a template

: Environment-specific settings that are typically committed to version control to share team-wide defaults.

files used to store sensitive data and configuration settings, .env.local.production

.env.local.production is a local configuration file used to store environment variables that should only be active during a and only on a specific local machine .