url prefix

[kdesjard]

It would be useful to be able to have a url prefix configuration parameter in the case where an upstream load balancer may be using that prefix to send traffic to the bbox service.

pygeoapi has a similar config item:

api_rules:  # optional API design rules to which pygeoapi should adhere
      url_prefix: 'v{api_major}'  # adds a /v1 prefix to all URL paths

This could be accomplished using Actix's Scope mechanism.

[pka]

I did postpone this, because I wanted to keep the code easy to understand (e.g. paths in metdata). But yes, I'm supporting this.

[kdesjard]

If relative links are kept, then I suppose the prefix could be extracted from the public_server_url.