Install also NodeJS based monitors

[hakman]

Some of the app types have now new NodeJS based monitors. The install script should handle them also.

[megastef]

Parts of this script might be helpful:
https://github.com/sematext/docker-spm-client/blob/master/run.sh#L69

Install node & npm packages:

curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash 
apt-get update -qqy 
npm i spm-agent-mongodb sematext-agent-httpd sematext-agent-nginx -g

from: https://github.com/sematext/docker-spm-client/blob/master/Dockerfile

[hakman]

Thanks @megastef