Publishes a package to the registry so that it can be installed by name.
<folder>: A folder containing a package.json file
<tarball>: A url or file path to a gzipped tar archive containing a single folder with a package.json file inside.
[--tag <tag>]Registers the published package with the given tag, such that
npm install <name>@<tag>will install this version. By default,
npm publishupdates and
npm installinstalls 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).