Add Caddy reverse proxy configuration and Kopia backup documentation

- Create INFRASTRUCTURE-COMPLETE.md: Comprehensive infrastructure overview
  * Network architecture and DNS configuration
  * Storage architecture for Nextcloud (1.4TB warm storage via LVM)
  * Kopia backup setup with Backblaze B2 integration
  * Caddy reverse proxy configuration (CT 202)
  * Security configuration and capacity planning

- Add Caddy reverse proxy configurations:
  * caddy-kopia-integration.md: Integration steps for CT 202
  * caddy-kopia-reverse-proxy.md: Complete configuration reference
  * caddy/Caddyfile: Production-ready configuration
  * caddy/docker-compose.yml: Docker deployment spec

- Add Kopia backup documentation:
  * kopia-nextcloud-backblaze-setup.md: Complete Kopia setup guide
  * Backup strategy, retention policies, and restore procedures

- Update related documentation with consolidated references

Status: Infrastructure documented and ready for deployment

litellm-setup-guide.md

@@ -31,7 +31,7 @@ Master Key: litellm-local-key-change-in-production (⚠️ CHANGE THIS in produc
 
 **Why?** This centralizes your API key management in version control. Updates to one place affect all VMs.
 
-1. Open: **http://192.168.88.200:3000** (Your Gitea instance)
+1. Open: **http://192.168.88.27:3002** (Your Gitea instance)
 2. Login with your account (jgitta)
 3. Click **"+"** icon (top right) → **"New Repository"**
 4. Fill in:
@@ -147,7 +147,7 @@ docker-server (siklos @ 192.168.88.27)
         ├── litellm_config.yaml     # Model definitions & API keys
         └── README.md               # Config documentation
 
-Gitea (gitea @ 192.168.88.200:3000)
+Gitea (gitea @ 192.168.88.27:3002)
 └── jgitta/litellm-config/
     └── (same files as above)
 ```