How to return plaintext using just nginx

nginx_return_plaintext_200.sh

theoretick@li1316-219:/etc/nginx/sites-enabled$ cat discuss_it
server {
    listen 80 default;

    server_name www.discussitapp.com discussitapp.com;

    location / {
      #proxy_pass http://sinatra;
      proxy_pass http://localhost:3000;
    }

    location /chat_hole {
      proxy_pass http://localhost:3001/;
    }

    location /status_test/200 {
      return 200 '200 OK';
      add_header Content-Type text/plain;
    }
}