Redirect www/non-www variants

.htaccess

# Ensure canonical domain
<IfModule mod_rewrite.c>
    RewriteEngine On
    
    # Use one of these two:
    
    # Rewrite www.domain.com -> domain.com
    RewriteCond %{HTTP_HOST} .
    RewriteCond %{HTTP_HOST} ^www.(.*)$ [NC]
    RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
    
    # OR:
    
    # Rewrite domain.com -> www.domain.com
    RewriteCond %{HTTP_HOST} !^$
    RewriteCond %{HTTP_HOST} !^www\. [NC]
    RewriteCond %{HTTP_HOST} (.+)$
    RewriteRule ^(.*)$ https://www.%1/$1 [R=301,L]
</IfModule>