No source map when debug

[Albert-Gao]

Followed the doc:
https://nexusjs.org/guides/recipes#with-vs-code

Works but without source map:

Could not read source map for file:///Users/AlbertGao/codes/teamingCloud/tcBackend/src/graphql/node.ts: ENOENT: no such file or directory, open '/Users/AlbertGao/codes/teamingCloud/tcBackend/src/graphql/node.js.map'

How to fix this? Thanks, would love to send a PR for the doc after learning. :)