feat: adding telegraf to docker group if docker is installed

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

roles/telegraf/tasks/main.yaml

@@ -27,6 +27,17 @@
     state: latest
     update_cache: true
 
+- name: Gather the package facts
+  ansible.builtin.package_facts:
+    manager: auto
+
+- name: Add telegraf to docker group
+  ansible.builtin.user:
+    name: telegraf
+    groups: docker
+    append: true
+  when: "'docker-ce' in ansible_facts.packages"
+
 - name: Enable telegraf service
   ansible.builtin.service:
     name: telegraf