Add url base path support

[yangkghjh]

Is your feature request related to a problem? Please describe.
To deploy service with a reverse proxy.

Describe the solution you'd like
Add flag --base-path.

Describe alternatives you've considered

Additional context

[pskrbasu]

Hey @yangkghjh, could you please expand a bit more about the issue?

• What exactly are you looking to do?
• What behaviour are you suggesting?

[yangkghjh]

To deploy the server behind a reverse proxy with a sub-path.

Like www.example.com/powerpipe.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 30 days.