fix: resolve yamllint violations in docker role

- Remove standalone comment blocks that caused indentation errors
- Collapse multiline repo string to single line
- Ensure document start marker is present

ansible/roles/docker/tasks/main.yml

@@ -1,8 +1,6 @@
 ---
 # Set up Docker's official apt repository and install Docker + Compose plugin.
 
-# --- Debian/Ubuntu: add Docker official repo ---
-
 - name: Install prerequisites for Docker repo (Debian/Ubuntu)
   ansible.builtin.apt:
     name:
@@ -30,11 +28,7 @@
 
 - name: Add Docker apt repository
   ansible.builtin.apt_repository:
-    repo: >-
-      deb [arch={{ ansible_facts['architecture'] | regex_replace('x86_64', 'amd64') | regex_replace('aarch64', 'arm64') }}
-      signed-by=/etc/apt/keyrings/docker.asc]
-      https://download.docker.com/linux/{{ 'ubuntu' if ansible_facts['distribution'] == 'Ubuntu' else 'debian' }}
-      {{ ansible_facts['distribution_release'] }} stable
+    repo: "deb [arch={{ ansible_facts['architecture'] | regex_replace('x86_64', 'amd64') | regex_replace('aarch64', 'arm64') }} signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/{{ 'ubuntu' if ansible_facts['distribution'] == 'Ubuntu' else 'debian' }} {{ ansible_facts['distribution_release'] }} stable"
     filename: docker
     state: present
     update_cache: true
@@ -58,8 +52,6 @@
     state: absent
   when: ansible_facts["os_family"] == "Debian"
 
-# --- Alpine ---
-
 - name: Install Docker (Alpine)
   community.general.apk:
     name:
@@ -68,8 +60,6 @@
     state: present
   when: ansible_facts["os_family"] == "Alpine"
 
-# --- Common ---
-
 - name: Enable and start Docker
   ansible.builtin.service:
     name: docker