events {
  worker_connections 1024;
}

http {
  include /etc/nginx/mime.types;
  default_type application/octet-stream;
  sendfile on;
  server_tokens off;

  upstream backend_a {
    server backend-a:80;
  }

  upstream backend_b {
    server backend-b:80;
  }

  upstream backend_c {
    server backend-c:80;
  }

  server {
    listen 80;
    server_name _;

    location / {
      root /usr/share/nginx/html;
      try_files $uri $uri/ /index.html;
    }

    location /service/a {
      proxy_pass http://backend_a/;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto http;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location = /demo/a {
      proxy_pass http://backend_a/;
    }

    location /service/b {
      proxy_pass http://backend_b/;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto http;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location /service/c {
      proxy_pass http://backend_c/;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto http;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location = /healthz {
      default_type text/plain;
      return 200 "ok\n";
    }
  }
}