Docker mount error when installing airis-mcp-gateway via superclaude mcp

superclaude mcp

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Select option (g for gateway, 0 for all, or comma-separated numbers) [g]: g

 Installing AIRIS MCP Gateway (Recommended)
   This provides 60+ tools through a single endpoint with 98% token reduction.

   ✅ Docker is available
    Installation directory: /home/natsuko/.superclaude/airis-mcp-gateway
    Downloading docker-compose configuration...
    Starting AIRIS MCP Gateway containers...
   ❌ Failed to start containers:  Container airis-serena Running 
 Container airis-mcp-gateway-core Running 
 Container airis-mcp-gateway-core Waiting 
 Container airis-mcp-gateway-core Healthy 
 Container airis-mcp-gateway Starting 
Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/home/natsuko/.superclaude/airis-mcp-gateway/mcp-config.json" to rootfs at "/app/mcp-config.json": mount src=/home/natsuko/.superclaude/airis-mcp-gateway/mcp-config.json, dst=/app/mcp-config.json, dstFd=/proc/thread-self/fd/11, flags=MS_BIND|MS_REC: not a directory: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type