# Allow image files only
<FilesMatch "\.(jpg|jpeg|png|gif|webp)$">
    Order Allow,Deny
    Allow from all
</FilesMatch>

# Deny access to PHP files
<FilesMatch "\.php$">
    Order Deny,Allow
    Deny from all
</FilesMatch>

# Prevent directory listing
Options -Indexes

# Enable image caching
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType image/jpeg "access plus 1 year"
    ExpiresByType image/png "access plus 1 year"
    ExpiresByType image/gif "access plus 1 year"
    ExpiresByType image/webp "access plus 1 year"
</IfModule>