Add separate file for aur task & add rootless docker tasks

tasks/docker.yml

@@ -0,0 +1,28 @@
+- name: copy docker mapping files
+  become: true
+  template:
+    src: '{{ item.src }}'
+    dest: '{{ item.dest }}'
+  loop:
+    - {
+        src: 'templates/subgid.j2',
+        dest: '/etc/subgid',
+      }
+    - {
+        src: 'templates/subuid.j2',
+        dest: '/etc/subuid',
+      }
+
+- name: ensure correct DOCKER_HOST is set
+  lineinfile:
+    path: '{{ ansible_env.HOME }}/.bashrc'
+    regexp: '^export DOCKER_HOST='
+    line: 'export DOCKER_HOST=unix:///run/user/{{ ansible_user_uid }}/docker.sock'
+
+- name: enable docker socket
+  systemd:
+    name: docker.socket
+    state: restarted
+    enabled: true
+    scope: user
+    daemon_reload: true