feat: add SEO descriptions to all pages and fix canonical URL

content/3.serveex/2.core/1.installation.md

@@ -1,6 +1,7 @@
 ---
 navigation: true
 title: Debian 13
+description: Step-by-step guide to install Debian 13 on a home server and set up SSH access, essential packages, and a ready-to-use base system.
 main:
   fluid: false
 ---

content/3.serveex/2.core/2.docker.md

@@ -1,6 +1,7 @@
 ---
 navigation: true
 title: Docker
+description: Install Docker and Dockge on Debian to deploy and manage self-hosted services with simple container stacks.
 main:
   fluid: false
 ---

content/3.serveex/2.core/3.swag.md

@@ -1,6 +1,7 @@
 ---
 navigation: true
 title: SWAG
+description: Set up SWAG as a reverse proxy with automatic SSL, expose your services securely, and configure geo-blocking on your homelab.
 main:
   fluid: false
 ---