fix(nomad): run nomad as root user to enable docker plugin on raspberry pis

Nomad is running as root rather than the Nomad user due to the Docker driver not being started when cgroups v2 are enabled. More info: https://github.com/hashicorp/nomad/pull/16063

templates/nomad.service.j2

@@ -7,9 +7,16 @@ ConditionFileNotEmpty={{ nomad_configuration_dir }}/nomad.hcl
 
 [Service]
 {# {% if 'linode' in group_names %} #}
-User=nomad
-Group=nomad
+{# User=nomad #}
+{# Group=nomad #}
 {# {% endif %} #}
+
+{# NOTE: Nomad is running as root rather than the Nomad user due to the Docker driver not being started when cgroups v2 are enabled.
+
+https://github.com/hashicorp/nomad/pull/16063
+ #}
+User=root
+Group=root
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/local/bin/nomad agent -config {{ nomad_configuration_dir }}
 KillMode=process