docs: Added compatibility guide

Author: edmondas

Diff for: .gitignore

@@ -1,2 +1,4 @@
 site/
+.vscode/
 .idea/
+.DS_Store

Diff for: docs/installation/compatibility-guide.md

@@ -0,0 +1,48 @@
+# PowerAdmin Compatibility Guide
+
+## Overview
+PowerAdmin requires PHP 8.1 or higher to run. This document outlines the supported Linux and BSD distributions as well as those that are not supported due to PHP version constraints. For the best experience, ensure your system meets or exceeds the recommended requirements.
+
+---
+
+## Minimum Requirements
+- **PHP**: 8.1 or higher
+- **Web Server**: Apache or NGINX
+- **Operating System**: Linux or BSD
+
+---
+
+## Supported Distributions
+
+| Distribution | PHP Version | Notes                      |
+|--------------|-------------|----------------------------|
+| Debian 12.7  | 8.2         |                            |
+| Ubuntu 22.04 | 8.1         |                            |
+| Ubuntu 24.04 | 8.3         |                            |
+| Fedora 40    | 8.3         | Apache included by default |
+| Fedora 41    | 8.3         | Apache included by default |
+
+---
+
+## BSD Operating Systems
+PowerAdmin is compatible with BSD operating systems that meet the PHP 8.1+ requirement. While not extensively tested, it should work as long as the environment is properly configured.
+
+---
+
+## Unsupported Distributions
+
+| Distribution            | PHP Version | Reason for Lack of Support |
+|-------------------------|-------------|----------------------------|
+| Debian 11               | 7.4         | PHP below minimum version  |
+| Ubuntu 20.04            | 7.4         | PHP below minimum version  |
+| CentOS Stream release 9 | 8.0         | PHP below minimum version  |
+| Rocky 8.10              | 7.2         | PHP below minimum version  |
+| Rocky 9.4               | 8.0         | PHP below minimum version  |
+| Alma 8.10               | 7.2         | PHP below minimum version  |
+| Alma 9.4                | 8.0         | PHP below minimum version  |
+
+---
+
+## Notes
+- Distributions listed as unsupported can potentially be configured manually with a custom PHP build, but this is not officially supported.
+- Upgrade paths are recommended for unsupported distributions to maintain security and compatibility.

Diff for: mkdocs.yml

@@ -34,6 +34,7 @@ nav:
 
   - Installation:
       - Quick Start: installation/quickstart.md
+      - Compatibility Guide: installation/compatibility-guide.md
       - Docker:
           - Installation: installation/docker.md
           - Docker Compose: installation/docker-compose.md