Bun

Bun is a recent Node replacement and competitor.

# To install:
curl -fsSL https://bun.sh/install | bash

Bun sells itself as being much faster than Node. It's worth verifying that this is actually true for your usecase first.

Configuration

Bun stores all configuration for the runtime in a bunfig.toml file.

Private registries

[install]
# This is the default install location.
"registry" = "https://registry.npmjs.org/"

[install.scopes]
# Environment variables are supported in this config.
"@custom" = { url = "https://npm.pkg.github.com", token = "$GITHUB_OAUTH_TOKEN" }
"@again" = { url = "https://npm.pkg.github.com", token = "$GITHUB_OAUTH_TOKEN" }

For more info, see their page on Scopes and registries.