Add node exporter

No molecule. This was dropped because of docker in docker reasons. Timeline remains dirty, can't amend commits from before first merge, sorry.

Author: raneq

tasks/main.yml

@@ -6,6 +6,7 @@
     pkg:
       - gpg
 
+
 # Adding this user to docker group can have security issues when docker
 # manages other containers too, but it's better than running docker from root.
 - name: User to execute the manage docker on behalf of monitoring