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

As an engineering team that is self hosting the temporal UI to support multiple environments (dev, staging, production) it is not particularly obvious to engineers on the team which environment they are accessing temporal in.

Describe the solution you'd like

I think it could be beneficial if there was a color coded banner at the top of the UI that we could control via environment variables. If a feature like that existed we could set red for production, yellow for staging, and green for dev so that if an engineer opens a tab in the wrong environment that tab will stand out more.

Additionally, it may be nice to be able to configure the environment name in the banner as well since I imagine different users of temporal may use different terms for their environments.

Describe alternatives you've considered

We currently use different domains for each environment which does allow team members to check the url to verify they are in the right environment before managing a workflow. But as people often have lots of tabs open at once and switch tabs quickly I find this not to be particularly obvious.

Additional context