Only PNG and no drawio output generated with docker container and vscode/github copilot

[NanoMil]

Hi, thanks for this interesting project!

I have issues, that in my case only the PNG output is generated and not the drawio output.

Context:
Visual Studio Code: 1.108.2
Github Copilot 0.36.2
Running in Windows with WSL2.

The MCP server is used as docker container.

{
	"servers": {
		"mcp-infrastructure-diagram": {
			"type": "stdio",
			"command": "docker",
			"args": [
				"run",
				"--rm",
				"--interactive",
				"--env",
				"FASTMCP_LOG_LEVEL=ERROR",
				"infrastructure-diagram-mcp-server:latest"
			]
		}
	},
	"inputs": []
}

Terminal output:

2026-01-28 10:53:13.957 [info] Starting server mcp-infrastructure-diagram
2026-01-28 10:53:13.957 [info] Connection state: Starting
2026-01-28 10:53:13.963 [info] Starting server from LocalProcess extension host
2026-01-28 10:53:13.968 [info] Connection state: Starting
2026-01-28 10:53:13.968 [info] Connection state: Running
2026-01-28 10:53:14.906 [info] Discovered 6 tools
2026-01-28 10:53:14.959 [warning] [server stderr] [01/28/26 09:53:14] ERROR    Could not load 'sarif': No module  extension.py:227
2026-01-28 10:53:14.959 [warning] [server stderr]                              named 'jschema_to_python'
2026-01-28 10:57:36.685 [info] Stopping server mcp-infrastructure-diagram

I assume you use an other tool stack, so I don't expect specific help here, but since I have issues to get it running with cline and claude for a cross check, I am just wondering: Does it work for you with the latest version of your tool and the docker container is generating an draw.io file along with png?

I only get the PNG at the moment.

I also tried to add to docker file this to resolve the error from the terminal output:
python3 -m pip install jschema-to-python but couldn't get it fully running.

Thanks in advance

[andrewmoshu]

Hey!
Thanks a lot for raising this issue and sorry for late reply..
I will work on a proper fix for Docker-based deployments in the upcoming days