How to serve acme-challenge file dynamically with Jester REST API?

I want to automate the process of renewing the certificate. But to do that, I don't think there's any other way other than generating the file dynamically like I tried above right?

How to serve acme-challenge file dynamically with Jester REST API?

Is it possible to dynamically serve the acme challenge file generated and required by certbot with rest api by jester with nim lang? I have this code get "/.well-known/acme-challenge/@challenge": writeFile(getCurrentDir() / @"challenge", @"challenge") sendFile ge