Currently, we still support /annotator endpoint for back-compalibility:

[old]GET /annotator/<curie> same as [new]GET /curie/<curie>
[old]POST /annotator same as [new]POST /trapi

We should make these steps to deprecate /annotator endpoint eventually:

1. [currently] keep legacy /annotator endpoint support for now and notify users to use the new endpoints
2. ask ITRB to set up redirection of /annotator to proper new URL for both GET and POST
3. remove /annotator endpoint support from our own application
4. [in the future] when there is no or very few requests sending to /annotator we can ask to remove the redirection