Binary package “npm” in ubuntu xenial

package manager for Node.js

 Node.js is an event-based server-side javascript engine.
 npm is the package manager for the Node JavaScript platform. It puts
 modules in place so that node can find them, and manages dependency
 conflicts intelligently.
 It is extremely configurable to support a wide variety of use cases.
 Most commonly, it is used to publish, discover, install, and develop
 node programs.