add pihole image update

defaults/main.yml

@@ -26,3 +26,4 @@ pihole_local_resolver:
 pihole_dns_servers:
   - '127.0.0.1'
   - '{{pihole_local_resolver | default(1.1.1.1)}}'
+pihole_update_container: false

tasks/main.yml

@@ -14,6 +14,13 @@
     __docker_pihole_random_password: "{{ lookup('password', '/dev/null chars=ascii_letters,digits') }}"
     __docker_pihole_admin_password: "{{ pihole_admin_password | default(__docker_pihole_random_password) }}"
 
+
+- name: update image if needed
+  docker_image:
+    image: "{{ pihole_image_name }}"
+    force: yes
+  when: pihole_update_container == True
+
 - name: "[docker] Setup the pi-hole docker container"
   docker_container:
     name: "{{ pihole_container_name }}"
@@ -33,6 +40,12 @@
     dns_servers: "{{ pihole_dns_servers }}"
   become: yes
 
+- name: cleanup old image
+  docker_prune:
+    images: yes
+  when: pihole_update_container == True
+
+
 - name: "add custom dnsmask file"
   template:
       dest: "{{pihole_host_dir_dnsmasqd}}/02-localresolver.conf" # required. Location to render the template to on the remote machine.