nginx.conf

upstream sse_backend {
  server localhost:38068;
}

server {

  # ....

  location /api/stream {
      proxy_pass http://sse_backend/stream;
      proxy_buffering off;
      proxy_cache off;
      chunked_transfer_encoding off;
      add_header Content-Type text/event-stream;
      add_header Cache-Control no-cache;
      proxy_read_timeout 86400;
      proxy_send_timeout 86400;
      keepalive_timeout 0;
      error_page 502 =200 @fallback_sse;
  }

  location @fallback_sse {
      default_type text/event-stream;
      add_header Cache-Control no-cache;
      return 200;
  }
}