feat: Add multi-cluster support with JSON config

docker-compose.yml

@@ -3,27 +3,12 @@ services:
     image: gitea.ext.ben.io/b3nw/proxmox-mcp-custom:latest
     container_name: proxmox-mcp
     environment:
-      # --- Proxmox API Credentials ---
-      # Base URL of your Proxmox VE instance (host:port, no https://)
-      - PROXMOX_URL=hostname:8006
-      
-      # Proxmox API User - full "user@realm" format
-      # Example: root@pam, admin@pve, proxmox-mcp@pam
-      - PROXMOX_USER=proxmox-mcp@pam
-      
-      # Proxmox API Token ID - JUST the token name, NOT the full ID
-      # If your full token is "proxmox-mcp@pam!mytoken", use only "mytoken"
-      - PROXMOX_TOKEN_ID=token
-      
-      # Proxmox API Token Secret (the UUID-like value)
-      - PROXMOX_PASSWORD=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
-      
-      # SSL verification - 'false' for self-signed certs in homelab
-      - PROXMOX_VERIFY_SSL=false
-      
       # --- MCP Transport Security ---
       # Allowed Host headers (comma-separated, supports :* for wildcard ports)
-      - MCP_ALLOWED_HOSTS=hostname,localhost:*,127.0.0.1:*
+      - MCP_ALLOWED_HOSTS=proxmox-mcp.example.io,localhost:*,127.0.0.1:*
+    volumes:
+      # Mount your clusters.json configuration file
+      - ./clusters.json:/app/clusters.json:ro
     ports:
       - "8000:8000"
     restart: unless-stopped