How to properly generate robots.txt Symfony 4?

Question

symfony

Hello.

Tell me if there is a ready-made solution for generating robots.txt for Symfony 4 (to be precise 4.3.11)? There are practically no ready-made bundles, and those that I found are outdated and I didn’t manage to “start” them.

• miisieq/RobotsTxtBundle
  
• evheniy/RobotsTxtBundle
  

And I couldn't find any information on self-creation. Could (if any) share a ready-made solution or suggest which way to dig.

Thank you!