Environment Variables: Config Outside Your Code
Think of a .env file as a Post-it note of secrets for your app, kept separate from your codebase. Use it for API keys or database URLs that change between environments. The biggest mistake is committing your .env file to Git, exposing all your secrets.
Think of a .env file as a Post-it note of secrets for your app, kept separate from your codebase. This follows the Twelve-Factor App principle of separating configuration from code. It's essential for managing API keys, database URLs, and settings that differ between local, staging, and production. The `dotenv` library loads these into Node's `process.env`. The biggest mistake is committing your .env file to Git; always add it to `.gitignore`. Also, ensure `dotenv.config()` runs before any code that needs the variables.
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- #nodejs
- #configuration
- #security
- #express
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