Rebase to Alpine 3.15.
Feature Allow to configure an indexer's API path. See #766
Feature OpenAPI docs are now available under http://127.0.0.1:5061/v3/api-docs/. This will only be interesting for very few (if any) users. Unfortunately I couldn't get the swagger UI working. You'll have to visit http://127.0.0.1:5061/swagger-ui/index.html and paste the api-docs URL.