dotenv-flow
Loads environment variables from `.env.[development|test|production][.local]` files
run-with-node-env
Set the `NODE_ENV` variable on all platforms. Without `cross-spawn`, very slim.
@tsmx/secure-config
Easy and secure configuration management. JSON based encrypted secrets, optional HMAC validation.
@remscodes/env-mode
A tiny, handy and strongly typed library for working with the env mode (NODE_ENV)