Prometheus set-up

[geahaad]

32 Basic containerised prometheus setup, with scrapers for:

• docker engine (Requires docker to be run in experimental mode)
• cadvisor
• node-exporter (Requires native installation on host)

Includes an additional Grafana Dashboard for all metrics collected by node-exporter, based on 1860

[PaulWen]

Should we update the Readme.md to include the installation step of node_exporter and name the new dashboard?

[geahaad]

Should we update the Readme.md to include the installation step of node_exporter and name the new dashboard?

Valid remark - added an installation guide for node-exporter.