.env.development [99% RELIABLE]

docker run --env-file .env.development myapp:dev

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. .env.development

: It prevents you from accidentally using production data (like a live customer database) while testing new features. Automation : Modern tools like Create React App docker run --env-file

Here's a typical React development .env setup: along with its siblings ( .env.production