.env.local Jun 2026

Providing a .env.example file that lists the keys required for the project without providing the actual values , allowing new developers to set up their own .env.local easily. Integration in the Development Workflow

.env.local is a local environment file used to store environment variables for a project (usually a Node.js/JavaScript web app). It's intended for machine- or developer-specific secrets and settings that should not be committed to version control. .env.local

| Practice | Rationale | | :--- | :--- | | | Prevents secret leakage via commit. | | Never use .env.local in production | Use secret injection (e.g., AWS Secrets Manager, Vault, GitHub Secrets). | | Provide a .env.example file | Document required variables without exposing real values. | | Do not place .env.local in build artifacts | Ensure .dockerignore also excludes it. | | Load only necessary variables | Avoid dumping process.env into client bundles. | Providing a

: Notice that some variables are prefixed with REACT_APP_ or NEXT_PUBLIC_ . This is often required in certain frameworks: | Practice | Rationale | | :--- |