How to resolve an import statement in Deno

Hi, I am testing out Deno, but cannot get it to resolve imports.

For example, how would I get Deno to resolve this import statement...
import { readFileTxt } from '@root/db_fs/src/utilReadFiles';

Notice two things...
1) the "@root" should resolve to "./packages" (i.e. "project-root/packages")
2) if no file extension is specified, a ".js" extension is inferred

Thank you.