Add Docker configuration for Walter Coiffure WordPress site

- Add docker-compose.yml with WordPress and MariaDB services
- Configure Traefik reverse proxy with automatic SSL
- Add environment variables template (.env.example)
- Add comprehensive README with deployment instructions
- Exclude waltercoiffure/ data directory from version control

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,8 @@
+# Configuration de la base de données
+MYSQL_DATABASE=waltercoiffure
+MYSQL_ROOT_PASSWORD=your_root_password_here
+MYSQL_USER=waltercoiff
+MYSQL_PASSWORD=your_password_here
+
+# Configuration du domaine
+DOMAIN=walter-coiffure.example.com