Add wg-easy VPN stack for easy WireGuard setup and management

[aravhawk]

Add wg-easy VPN stack for easy WireGuard management

This pull request introduces a new stack, "wg-easy," to the ClusteredPi project. The stack utilizes the wg-easy Docker image to simplify the setup and management of a WireGuard VPN. Key features include:

• docker-compose.yml:

  • Sets up port forwarding for VPN and web UI.
  • Configures the wg-easy service with necessary environment variables.
  • Maps ports 51820 (UDP) for VPN and 51821 (TCP) for the web UI.
  • Includes system controls for network forwarding and valid marks.

• WG-EASY.md:

  • Provides pre-installation steps to ensure proper setup.
  • Instructions to replace placeholders with actual router IP and a secure password.

This stack aims to make WireGuard VPN setup and management straightforward and accessible for users, enhancing the overall functionality of the ClusteredPi project.