Allow customisation of base path

[Limess]

Current behaviour

When trying to host DBT documentation on a non-top level path the docs site looks for a few files at the root path

e.g.

Hosting the index.html file at https://my-internal-domain.com/dbt
The docs fail to load due to requesting https://my-internal-domain.com/catalog.json

Expected behaviour

Allow customisation of the base url so JSON file requests resolve from the given url, e.g https://my-internal-domain.com/dbt/catalog.json.

Workaround

For now we're fixing this by explicitly proxying .json files generated by DBT to the path we expose the dbt documentation on:

location ~ ^/(catalog|run_results|manifest)\.json$ {
  rewrite ^/(.*)$ /dbt/$1;
}

[github-actions]

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[fdroessler]

Is there any chance something like this could happen?