Publish npm tarball to Nexus private registry

Set auth token to npm registry to download files:

npm config set http://registry.npmjs.org/:_authToken npm_xxxxxxxxxxxxxxxxxxxxxxxxxxx

Download the target tarball for package socket.io-adapter@2.5.5 - as example:

wget $(npm view socket.io-adapter@2.5.5 dist.tarball)

Authenticate to nexus:

npm login --registry=https://nexus.domain.tld/repository/npm-repo/ --always-auth --userconfig=./.npmrc

Publish downloaded package to Nexus:

npm --registry=https://nexus.domain.tld/repository/npm-repo/ publish socket.io-adapter-2.5.5.tgz