rewrite /v1/.... to /api/httpsms/v1/.....

Caddyfile

{
auto_https off
debug
}

:80 {
     root * /app/public
     encode zstd gzip
     file_server

     vars /v1/* my-path /api/httpsms{path}
     vars my-path {path}

     php_fastcgi phpfpm:9000 {
        env REQUEST_URI {vars.my-path}
     }

     log {
       # output logs to standard error (console)
       output stderr
     }
}

https://macropage.medium.com/a-story-about-caddy-nginx-and-some-laravel-routing-258948a56c28
https://caddyserver.com/docs/caddyfile/directives/vars