If you support the CI pipelines, you can put some conventions that you expect to run npm ci, npm build and then npm unit-tests-run and you don't care what they

If you support the CI pipelines, you can put some conventions that you expect to run npm ci, npm build and then npm unit-tests-run and you don't care what they use as long as it returns without errors and puts the deployable artifact in ./dist/public/ or whereever you expect it. If you are bold enough you can ask to write makefiles too -- let them have it. Why should it even be your problem.