Exclude Vim * .sw * files from angular-cli auto rebuild

Question

This is due to https://github.com/angular/angular-cli/issues/2425 , where the end result was deleting files fromangular-cli.json

How do I modify a file angular-cli.jsonto ignore some file extensions?

Ideally, I would ignore *.swpso that it ng servedoesn't rebuild every time I type inside vim.