Publish a package
npm publish <tarball> [--tag <tag>] npm publish <folder> [--tag <tag>]
Publishes a package to the registry so that it can be installed by name.
A folder containing a package.json file
A url or file path to a gzipped tar archive containing a single folder
with a package.json file inside.
Registers the published package with the given tag, such that
<name>@<tag> will install this version. By default,
npm publish updates
npm install installs the
Fails if the package name and version combination already exists in the registry.
Once a package is published with a given name and version, that specific name and version combination can never be used again, even if it is removed with npm-unpublish(1).