I have built a Java Backend with Jersey services, Which I can fetch from with a front end javascript.

When I run it locally on tomcat I have no issues;

POST http://localhost:8080/restservices/authentication/ with the response being a working JWToken.

Whereas wheN I try to hos this on heroku, I keep getting a 404 response saying it cannot find it.

POST https://archive-trawler.herokuapp.com/restservices/authentication/

Type Status Report
HTTP Status 404 – Not Found

Message The requested resource [/restservices/authentication/] is not available
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
Apache Tomcat/9.0.52