Add VPS notes and ansible playbook

ansible/ansible.cfg

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+[defaults]
+inventory = inventory.ini
+host_key_checking = False

ansible/docker.yml

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+---
+- name: Install Docker on VPS
+  hosts: vps
+  become: true
+  tasks:
+    - name: Update apt cache
+      apt:
+        update_cache: yes
+
+    - name: Install prerequisites
+      apt:
+        name:
+          - ca-certificates
+          - curl
+          - gnupg
+        state: present
+
+    - name: Ensure keyrings directory exists
+      file:
+        path: /etc/apt/keyrings
+        state: directory
+        mode: '0755'
+
+    - name: Download Docker GPG key
+      get_url:
+        url: https://download.docker.com/linux/ubuntu/gpg
+        dest: /etc/apt/keyrings/docker.asc
+        mode: '0644'
+
+    - name: Add Docker APT repository
+      ansible.builtin.deb822_repository:
+        name: docker
+        types: deb
+        uris: https://download.docker.com/linux/ubuntu
+        suites: "{{ ansible_facts['distribution_release'] }}"
+        components: stable
+        signed_by: /etc/apt/keyrings/docker.asc
+
+    - name: Install Docker packages
+      apt:
+        name:
+          - docker-ce
+          - docker-ce-cli
+          - containerd.io
+          - docker-buildx-plugin
+          - docker-compose-plugin
+        state: present
+
+    - name: Add ubuntu user to docker group
+      user:
+        name: ubuntu
+        groups: docker
+        append: yes
+
+    - name: Start and enable Docker services
+      systemd:
+        name: "{{ item }}"
+        state: started
+        enabled: yes
+      loop:
+        - containerd
+        - docker

ansible/inventory.ini

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+[vps]
+135.125.232.253 ansible_user=ubuntu ansible_python_interpreter=/usr/bin/python3