how to build mxgraph?

[pyon-yx]

I am not sure whether this is correct question or not in here.
I am launching drawio on my local env and trying to modify some codes of mxgraph by myself, but I don't know how to build mxgraph inside drawio.
When I run "npm run build" at the root directory, will it build mxgraph as well?
How can I check my modified code is deployed to self-hosted server?

Any kind of reply will be appreciated.
Thank you.