docs: remove all Coolify references from codebase

Replace Coolify with Docker Compose throughout documentation.
The project never used Coolify - a removal script was created but
never executed, leaving incorrect documentation.

Changes:
- Delete 13 heavily Coolify-focused docs files
- Update ~30 files replacing Coolify → Docker Compose
- Remove obsolete removal script
- Fix deployment references in active and archived projects

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

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

apps-archived/uload/docs/SECURITY_BEST_PRACTICES.md

@@ -81,7 +81,7 @@ PUBLIC_POCKETBASE_URL=https://ulo.ad/api
 POCKETBASE_ADMIN_URL=http://localhost:8090  # Nur intern!
 ```
 
-### 3. Firewall Rules (in Coolify/Hetzner)
+### 3. Firewall Rules (in Hetzner)
 
 ```bash
 # Nur benötigte Ports öffnen
@@ -105,7 +105,7 @@ apt install fail2ban
 ### 2. Logs überwachen
 
 ```bash
-# In Coolify Alerts einrichten für:
+# In Monitoring einrichten für:
 - Fehlgeschlagene Admin-Logins
 - Ungewöhnlich viele API-Anfragen
 - 404 auf /_/ Route