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

[muhitrhn]

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 getCurrentDir() / @"challenge"
    
    Run

which works if used with browser but doesn’t work with certbot