Demo: compare .env and .env.example
Environment drift causes avoidable deployment failures. A diff checker makes missing, empty, duplicated, and undocumented variables visible before a release.
- Compare required variables against the example file.
- Flag empty values separately from missing keys.
- Never paste real production secrets into public tools.
.env.example
DATABASE_URL=
REDIS_URL=
DEEPSEEK_API_KEY=
.env
DATABASE_URL=postgres://local
REDIS_URL=redis://local