Ok the problem is resolved.
My error is to have repositioned the values in the proxypass like /prometheus/api/v1, it was just enough to define location /prometheus/ {
proxy_pass http://mimir_service/;
My error is to have repositioned the values in the proxypass like /prometheus/api/v1, it was just enough to define location /prometheus/ {
proxy_pass http://mimir_service/;