http://localhost:7000/api/document/identifier

http://localhost:7000/api/document/identifier/$populate

http://localhost:7000/api/?identifier=urn:portal%7Cidentifier

location ~ ^/api/document/(.*)/$populate$ {
    alias ./populate-mock/$1.json;
}

location ~ ^/api/document/(.*)$ {
    alias ./mock/$1.json;
}