.netcore nginx error 500?

Question

Nginx

There is a .net core webapi standard project created by the wizard.
locally everything works
when uploaded to the server, but not quite ok
/api/values ​​- works, returns ["value1","value2"]
/api/values/1 - DOES NOT work, returns error 500
according to nginx logs:
2019/04/ 17 02:44:20 [error] 6019#6019: *1 connect() failed (111: Connection refused) while connecting to upstream, client: xxx.xxx.xxx.xxx, server: _, request: "GET /api /values/1 HTTP/1.1", upstream: " [::1]:5000/api/values/1 ", host: "xxx.xxx.xxx.xxx"
I guess you need to somehow configure nginx, but where and how Don't know.
Please help...