chore: Update deployment configuration and documentation

- Update Gitea configuration (remove DEFAULT_ACTIONS_URL)
- Fix deployment documentation
- Update Ansible playbooks
- Clean up deprecated files
- Add new deployment scripts and templates

deployment/README.md

@@ -54,8 +54,6 @@ deployment/
 │   ├── playbooks/            # Deployment automation
 │   ├── inventory/            # Server inventory
 │   └── secrets/              # Ansible Vault secrets
-├── runner/                    # Gitea Actions runner (dev machine)
-├── scripts/                   # Helper scripts
 └── docs/                      # Deployment documentation
 ```
 
@@ -120,16 +118,31 @@ Each stack has its own README with detailed configuration:
 
 ## Deployment Commands
 
-### Manual Deployment
+### Code deployen (Image-basiert)
 ```bash
-./scripts/deploy.sh
+cd deployment/ansible
+ansible-playbook -i inventory/production.yml \
+  playbooks/deploy-update.yml \
+  -e "image_tag=abc1234-1696234567"
 ```
 
-### Rollback to Previous Version
+### Code synchen (Git-basiert)
 ```bash
-./scripts/rollback.sh
+cd deployment/ansible
+ansible-playbook -i inventory/production.yml \
+  playbooks/sync-code.yml \
+  -e "git_branch=main"
 ```
 
+### Rollback zu vorheriger Version
+```bash
+cd deployment/ansible
+ansible-playbook -i inventory/production.yml \
+  playbooks/rollback.yml
+```
+
+**📖 Vollständige Command-Referenz:** Siehe [DEPLOYMENT_COMMANDS.md](DEPLOYMENT_COMMANDS.md)
+
 ### Update Specific Stack
 ```bash
 cd stacks/<stack-name>