Use mastodon version for docker

defaults/main.yml

@@ -20,7 +20,7 @@ mastodon_bare_installation: false
 mastodon_composer_folder: /opt/mastodon
 mastodon_docker_image: "moritzheiber/mastodon-docker"
 mastodon_docker_network: "mastodon_network"
-mastodon_version: "latest" 
+mastodon_version: "v4.1.5" 
 mastodon_allow_prerelease: "false"
 mastodon_user: "mastodon"
 mastodon_home: "/home/{{ mastodon_user }}"

tasks/docker/docker.yml

@@ -28,6 +28,7 @@
     dest: "{{ mastodon_composer_folder }}"
     force: true
     update: true
+    reference: "{{ mastodon_version }}"
 
 - name: Create docker-compose.yaml file
   template: