400 Bad Request

location ^~/gateway/ {
    proxy_set_header   Host $host:$server_port;
    proxy_set_header   X-Real-IP $remote_addr;
    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header   X-NginX-Proxy true;
    proxy_pass http://k8s_yshop-gateway-svc/;
}