Allow to enable HSTS easily on my server

.htaccess

@@ -6,13 +6,14 @@
 
     RewriteEngine On
 
+    # Uncomment if HTTPS is enabled. FYI, HSTS header increases security of your website & SEO
+    # <IfModule mod_headers.c>
+    #    Header set Strict-Transport-Security "max-age=31536000; preload" env=HTTPS
+    # </IfModule>
+
     # Remove www subdomain in the URL
     # RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
-    # RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
-
-    # Force the URL to be https (only if you have an SSL certificate)
-    # RewriteCond %{SERVER_PORT} 80
-    # RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
+    # RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
 
     # Redirect trailing slashes if it isn't a folder
     RewriteCond %{REQUEST_FILENAME} !-d