Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

Someone writing a rich browser app, e.g. React, might want to send telemetry via OTLP HTTP to the dashboard. The dashboard supports OTLP HTTP, but standard browser security blocks post requests from the browser app to the dashboard because they're hosted on different ports.

Describe the solution you'd like

Configuration to enable CORS for the dashboard's OTLP HTTP endpoints.

Additional context

No response