A few observation, not exactly bug or problem.

First great works, and thanks.
1. dotnet can do server side rendering also, and it has great design-time environment. The reactjs server side rendering is a little bit duplicate in this case, and makes me feel a little bit uncomfortable.
2. is es2015-webpack used at all?
3. I added some new launch settings, if you feel usefull, please incorporate it into the project
{
"name": "Node- build server, and debug build client",
"type": "node",
"request": "launch",
"program": "${workspaceRoot}/run.js",
"stopOnEntry": true,
"args": ["build", "--debug"],
},
{
"name": "Node- run client with DEBUG and HMR, start server.",
"type": "node",
"request": "launch",
"program": "${workspaceRoot}/run.js",
"args": ["start"],
},

Thanks

Start by inspecting run.js, the existing VS Code launch settings, and the es2015-webpack configuration mentioned in the issue. Clarify whether es2015-webpack is still used and whether the proposed Node launch configurations should be incorporated; done means the requested settings and usage decision are agreed and reflected in the project.

Written by the indexing model from the issue text.