add npm build to npm recipe

[unrup1]

Q	A
Issue Type	Feature Request
Deployer Version	^6.4
Recipes Version	^6.2
Local Machine OS	macOS
Remote Machine OS	debian stretch

Description

Add npm build to the npm recipe. if you want i can create the pull request.

Content of deploy.php

desc('Run npm build')
task('npm:build', function() {
    run("cd {{release_path}} && {{bin/npm}} build");
});