refactor: remove geerlingguy.docker dependency

Assume Docker and Docker Compose are already installed on the target
host. This decouples the role from a specific Docker installation
method; avoiding conflicts with existing setups.

README.md

@@ -12,13 +12,13 @@ This Ansible role automates the deployment of Gitea - a self-hosted Git service,
 
 ## Requirements
 
+- Docker and Docker Compose installed on the target host
 - jmespath Python library (install with: `pip install jmespath`)
 
 ## Sample Usage in a Playbook
 The following playbook was tested on the latest Debian 12, it should work on Ubuntu as well.
 
 ```yaml
-# Installs Docker and Compose if not available
 - name: Install Gitea using Docker Compose
   hosts: git.example.com
   become: yes

meta/main.yaml

@@ -17,6 +17,4 @@ galaxy_info:
     - gitserver
     - selfhosted
 
-dependencies:
-  - role: geerlingguy.docker
-    version: "7.8.0"
+dependencies: []

tasks/setup-compose.yaml

@@ -1,8 +1,4 @@
 ---
-- name: Set up Docker and Docker compose
-  ansible.builtin.include_role:
-    name: geerlingguy.docker
-
 - name: Create directory for Gitea Docker Compose stack
   ansible.builtin.file:
     path: "{{ gitea_home_path }}"