init: custom proxmox MCP server with SSE impementation

docker-compose.yml

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+services:
+  proxmox-mcp:
+    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:*
+    ports:
+      - "8000:8000"
+    restart: unless-stopped