fix: collect Docker facts only for servers in maintenance

tasks/main.yml

@@ -114,6 +114,7 @@
       owner: root
       group: root
       mode: '0700'
+  when: inventory_hostname in groups.maintenance_contract
 
 - name: Add cron job to check Docker versions every day
   ansible.builtin.cron:
@@ -121,6 +122,7 @@
       minute: "1"
       hour: "2"
       job: /root/collect_docker_facts.sh
+  when: inventory_hostname in groups.maintenance_contract
 
 # Flush handlers in order to be able to restart docker daemon with new config and retrieve vars
 - name: Flush handlers