environment-configuration

Environment configuration for Node, NestJS, Nuxt and Unity projects - twelve-factor config in the environment, environment parity across local, dev, staging and prod, typed schema-validated config that fails fast at startup, config versus secrets, sane defaults, feature flags, per-environment overrides, .env handling with a committed .env.example, build-time versus runtime config for frontends, and detecting config drift. Load when adding config or env vars, writing a config module, setting up .env files, or debugging environment-specific behavior.