nginx.conf

user www;
worker_processes auto;

error_log /var/log/nginx/error.log warn;

events {
  worker_connections 1024;
}

http {
  include /etc/nginx/mime.types;
  default_type application/octet-stream;
  sendfile on;
  access_log /var/log/nginx/access.log;
  keepalive_timeout 3000;

  server {
    listen 8201;
    server_name localhost;
    client_max_body_size 32m;

    location = / {
      return 200 "OK";
      add_header Content-Type "text/plain; charset=utf-8";
      add_header Content-Length 2;
    }

    location / {
      proxy_pass http://127.0.0.1:8200;
      proxy_redirect off;
    }
  }
}

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: app
spec:
  type: LoadBalancer
  ports:
    - port: 8200
      targetPort: 8201
      name: http