RewriteEngine on

RewriteCond %{HTTPS} !=on
RewriteCond %{HTTP_HOST} !=localhost
RewriteCond %{REQUEST_URI}  !^.*(jpg|png|gif)$
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{HTTP_HOST} !^www\.
RewriteCond %{HTTP_HOST} !=localhost
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

<Files ~ "\.md$">
deny from all
</Files>