Add complete homelab documentation and configurations

Documentation:
- OpenCode + LiteLLM integration guide
- LiteLLM complete setup with 16 models
- Gitea centralized configuration guide
- Testing procedures and verification
- API keys setup instructions

Configurations:
- OpenCode config pointing to LiteLLM
- Updated LiteLLM config with all models
- Nextcloud docker-compose template

Scripts:
- Gitea setup automation
- OpenCode testing script

Infrastructure:
- Gitea: 192.168.88.200:3000
- LiteLLM: 192.168.88.27:4000
- Nextcloud: 192.168.88.62

docs/setup/nextcloud-docker-compose-update.yml

@@ -0,0 +1,87 @@
+# Nextcloud VM (192.168.88.62) - Updated docker-compose.yml
+#
+# This configuration pulls OpenCode config from centralized Gitea repository
+# instead of managing per-VM configuration files
+#
+# Updated for centralized config management via http://192.168.88.200:3000
+
+version: '3.8'
+
+services:
+  # Keep existing Nextcloud service if present
+  # nextcloud:
+  #   image: nextcloud:latest
+  #   ... (existing config)
+
+  opencode:
+    image: opencode:latest
+    container_name: opencode
+
+    # Volumes for persistent configuration and workspace
+    volumes:
+      - opencode-config:/root/.opencode
+      - opencode-workspace:/workspace
+
+    # Expose port (adjust if needed)
+    ports:
+      - "8000:8000"
+
+    # Environment variables
+    environment:
+      HOME: /root
+      # LiteLLM Gateway endpoint is in the config.json file
+      # pulled from Gitea
+
+    # The key: pull config from Gitea at startup
+    entrypoint: /bin/sh
+    command: |
+      -c "
+      echo '🔄 Fetching configuration from Gitea...'
+      mkdir -p /tmp/homelab-configs
+
+      # Clone the central configs repo
+      if git clone http://192.168.88.200:3000/jgitta/homelab-configs.git /tmp/homelab-configs; then
+        echo '✅ Configuration fetched successfully'
+      else
+        echo '⚠️  Could not fetch configs from Gitea, using defaults'
+      fi
+
+      # Set up OpenCode config directory
+      mkdir -p /root/.opencode
+
+      # Copy OpenCode config if available
+      if [ -f /tmp/homelab-configs/opencode/config.json ]; then
+        cp /tmp/homelab-configs/opencode/config.json /root/.opencode/config.json
+        echo '✅ OpenCode config loaded from Gitea'
+      else
+        echo '⚠️  Using default OpenCode configuration'
+      fi
+
+      # Start OpenCode
+      echo '🚀 Starting OpenCode...'
+      exec opencode
+      "
+
+    # Restart policy
+    restart: unless-stopped
+
+    # Resource limits (adjust as needed)
+    # deploy:
+    #   resources:
+    #     limits:
+    #       cpus: '2'
+    #       memory: 2G
+    #     reservations:
+    #       cpus: '1'
+    #       memory: 1G
+
+volumes:
+  opencode-config:
+    driver: local
+
+  opencode-workspace:
+    driver: local
+
+networks:
+  default:
+    driver: bridge