Disable cache for websites hosted on siteground

By

Disable cache to whole site

<IfModule mod_headers.c>
Header set Cache-Control "private"
</IfModule>

Disable specific extension file

<IfModule mod_headers.c>
  <FilesMatch ".(log|txt)$">
    Header set Cache-Control "private"
  </FilesMatch>
</IfModule>

Ref. https://eu.siteground.com/kb/disable-dynamic-caching-website/#Disable_the_cache_on_a_non-WordPress_website