chore: add variable droneci_privileged and disable privileged by default

defaults/main.yml

@@ -54,6 +54,8 @@ droneci_networks_applied:
 # @var droneci_memory_reservation: $ "_unset_"
 # @var droneci_memory_reservation:example: $ "256m"
 
+droneci_privileged: False
+
 droneci_db_type: sqlite
 droneci_db_server: localhost
 droneci_db_port: 5432

templates/services/droneci_compose.yml.j2

@@ -31,7 +31,7 @@ services:
       - {{ host | quote }}
       {% endfor %}
     {% endif %}
-    privileged: true
+    privileged: {{ droneci_privileged | bool | lower }}
     environment:
       - DRONE_SERVER_HOST={{ droneci_host | urlsplit('hostname') }}
       - DRONE_SERVER_PROTO={{ droneci_host | urlsplit('scheme') }}