How to set a specific directory?

Question

htaccess

I have .htaccess, how can I set a specific directory in it?
for example:https://site.ru/ip/api/v1/

AddDefaultCharset utf-8

RewriteEngine On
RewriteCond ${REQUEST_FILENAME} !-f
RewriteCond ${REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php

RewriteCond %{HTTPS} off
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]