basic: add monitoring packages to apt install list

roles/basic/tasks/main.yml

 - name: Install things from apt
   apt:
-    name: [git, sudo, htop, mosh, tmux, ca-certificates, xtail, vim, python3-pip]
+    name: [git, sudo, htop, mosh, tmux, ca-certificates, xtail, vim, python3-pip, monitoring-plugins-standard, nagios-plugins-contrib]
     state: latest
     update_cache: yes