webp pres htacesss - drupal coloseum

.htaccess

<IfModule mod_rewrite.c>
  RewriteEngine On
  # Check if browser support WebP images
  RewriteCond %{HTTP_ACCEPT} image/webp
  # Check if WebP replacement image exists
  RewriteCond %{DOCUMENT_ROOT}/$1.$2.webp -f
  # Serve WebP image instead
  RewriteRule (.+)\.(jpe?g|png)$ $1.$2.webp [T=image/webp,E=accept:1]
</IfModule>
<IfModule mod_headers.c>
    Header append Vary Accept env=REDIRECT_accept
</IfModule>
AddType image/webp .webp

gistfile1.txt

https://www.drupal.org/project/webp
https://www.drupal.org/project/imageapi_optimize