convict

Featureful configuration management library for Node.js (nested structure, schema validation, etc.)

figue

Platform agnostic configuration management library, with environmental variables and validation, like convict but cross-env and zod schemas

spawnpoint

Agnostic JS framework that empowers devs to focus on quickly building apps, rather than focusing on application config, health-checks, application structure, or architecture to build a 12 factor app in Docker.