Great ep, Dave: thank you!

Has anyone tried adopting it with import-maps? 
I get:

Failed to register controller: pdf-reader (controllers/pdf_reader_controller)
TypeError: Module name, 'pdfjs-dist/build/pdf' does not resolve to a valid URL.

Has anyone adopted it with importmap? I get error Failed to register controller: TypeError: Failed to resolve module specifier "pdfjs-dist/build/pdf". Relative references must start with either "/", "./", or "../".