.env.development ^hot^ -

Enter the unsung hero of modern software development: . This file, along with its siblings ( .env.production , .env.test ), is the cornerstone of the Twelve-Factor App methodology. It separates code from configuration, ensuring your application runs flawlessly whether it’s on a laptop, a staging server, or a Kubernetes cluster.

# Specific to development environment PORT=3000 DB_URL=mongodb://localhost:27017/dev_db API_KEY=dev_secret_key_123 VITE_ANALYTICS_ID=UA-DEV-999 Use code with caution. Copied to clipboard Advanced Considerations Build-time vs. Run-time .env.development

docker run --env-file .env.development myapp:dev Enter the unsung hero of modern software development:

Create a .env.example file with keys but to show teammates what variables they need to set up. 4. Load the Variables How you use these variables depends on your environment: 🌐 Frontend (Vite/Next.js) Guides: Environment Variables - Next.js along with its siblings ( .env.production

The structure is intentionally simple and human-readable. A typical .env.development file might look like this:

if (process.env.ENABLE_FEATURE) // "false" is truthy!