feat: add initial setup for pearl server

roles/any.tools.docker/tasks/main.yml

@@ -0,0 +1,44 @@
+---
+- name: Ensure older Docker versions aren't installed.
+  apt:
+    name:
+      - docker
+      - docker-engine
+      - docker.io
+      - containerd
+      - runc
+    state: absent
+
+- name: Add Docker GPG key.
+  ansible.builtin.get_url:
+    url: 'https://download.docker.com/linux/ubuntu/gpg'
+    dest: '/etc/apt/trusted.gpg.d/docker.asc'
+    mode: '0644'
+    force: true
+
+- name: Add Docker PPA.
+  ansible.builtin.apt_repository:
+    # https://gist.github.com/rbq/886587980894e98b23d0eee2a1d84933
+    repo: "deb https://download.docker.com/{{ ansible_system | lower }}/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} stable"
+    state: present
+
+- name: Install Docker, docker-compose & cron.
+  apt:
+    name:
+      - docker-ce
+      - docker-ce-cli
+      - containerd.io
+    state: present
+
+- name: Ensure Docker is running & enabled.
+  service:
+    name: docker
+    state: started
+    enabled: true
+
+- name: Add Docker prune cronjob.
+  cron:
+    name: Prune the Docker system.
+    hour: 4
+    minute: 0
+    job: docker system prune -af