البيئة والأسرار

في هذا الدرس

supply configuration without committing secrets.

الموضوعات المخطط لها

• Use ${VAR} in compose.yaml; values come from your shell or an .env file.
• Commit .env.example with fake values; add .env to .gitignore.
• env_file: loads many variables into one service.
• Environment variables are for local development; real secrets use a secret manager in deployed environments.
• Never commit real passwords, even "temporary" ones.