Proxy inverso está mal

Hola, tengo un problema con Jenkins 2.452.2, me dice lo siguiente:

WARNING h.d.ReverseProxySetupMonitor#getTestForReverseProxySetup:

mi configuracion de mi contendor de nginx es:

The documentation offers a set of suggestions:

The nginx reverse proxy configuration instructions are a good place to check as well. They include a reverse proxy configuration video from Darin Pope.

Darin Pope has provided a video that is specifically related to the reverse proxy configuration message: