provide additional info to help users set up for frontend dev environment

[TERR-inss]

Pull Request Checklist

• The Rayhunter team has recently expressed interest in reviewing a PR for this.
  • If not, this PR may be closed due our limited resources and need to prioritize how we spend them.
• Added or updated any documentation as needed to support the changes in this PR.
• [-] Code has been linted and run through cargo fmt.
• [-] If any new functionality has been added, unit tests were also added.
• CONTRIBUTING.md has been read.

[untitaker]

I'd suggest to move this information to a troubleshooting section at the bottom.