Update frontend development doc about how to overwrite upstream esm

What does this MR do and why?

Update the front-end development documentation to include information on how to override the upstream ESM.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Closes #565 (closed)