npm publish [<tarball>|<folder>] [--tag <tag>] [--access <public|restricted>] [--otp otpcode] [--dry-run] Publishes '.' if no argument supplied Sets tag 'latest' if no --tag specified
Publishes a package to the registry so that it can be installed by name. All files in the package directory are included if no local .gitignore or .npmignore file exists. If both files exist and a file is ignored by .gitignore but not by .npmignore then it will be included. See npm help developers for full details on what's included in the published package, as well as details on how the package is built.
By default npm will publish to the public registry. This can be overridden by specifying a different default registry or using a npm help scope in the name (see npm help package.json).
Fails if the package name and version combination already exists in the specified 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 help unpublish.
As of npm@5, both a sha1sum and an integrity field with a sha512sum of the tarball will be submitted to the registry during publication. Subsequent installs will use the strongest supported algorithm to verify downloads.
Similar to --dry-run see npm help pack, which figures out the files to be included and packs them into a tarball to be uploaded to the registry.