feat: Add monorepo nestjs example

[lekhanhtoan37]

What is the current behavior?

Lack of monorepo nestjs example

Describe the feature

• Add monorepo nestjs example

[lekhanhtoan37]

Example which I made: https://github.com/lekhanhtoan37/bazel-nestjs-monorepo-example

[jbedard]

Want to open a PR to add that to bazel-examples? I think I'd want to change and simplify a few things if you're open for feedback before merging it..?

[lekhanhtoan37]

@jbedard I submitted a pr #309. Please feel free to feedback