Tugboat environment indicator settings do not follow ADR

[davereid]

https://architecture.lullabot.com/adr/20210609-environment-indicator/ says:

Branch Preview
White on Blue
Text: #fff
Background: #20688C

However we have it configured with the following:

  // See https://architecture.lullabot.com/adr/20210609-environment-indicator/
  $config['environment_indicator.indicator']['name'] = '☑️ Tugboat';
  $config['environment_indicator.indicator']['bg_color'] = '#990055';
  $config['environment_indicator.indicator']['fg_color'] = '#ffffff';

I think we should remove the emoji (it's out of place only on Tugboat) and update the bg_color value or our ADR?

[deviantintegral]

Agreed, let's fix it!

[davereid]

I'd also really love to document some kind of default environment indicator version (using the TUGBOAT_PREVIEW environment variable) so it's visible in the indicator as well.