Allow customizing the title of the documentation service

[ikhoon]

The title of the documentation service is hard-coded to Armeria documentation service <version>

armeria/docs-client/src/containers/App/index.tsx

Lines 608 to 611 in e0192cc

	Armeria documentation service
	{versions
	? ` ${extractSimpleArtifactVersion(
	versions.getArmeriaArtifactVersion(),

Some users may want to override the title to easily distinguish a server from a different phase or role.

DocService
  .builder()
  .webAppTitle("Messaging (Alpha)")
  ...
  .build()

The specified web app title could be appended to the default title.

Armeria documentation service 1.30.1 - Messaging (Alpha)

[dipeshsingh253]

Hi @ikhoon , I would like to contribute to this issue. Can you please assign it to me??

[ikhoon]

I've assigned #5219 to you. Do you want to resolve both of them at once?

[dipeshsingh253]

Yeah, I can do that. This seems a good first issue as well.