.htaccess

   1 Options +FollowSymLinks -MultiViews
   2 RewriteEngine On
   3 RewriteBase /
   4
   5 RewriteCond %{HTTPS} !=on
   6 RewriteRule ^(.*) https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
   7 Header always set Content-Security-Policy "upgrade-insecure-requests;"
   8
   9 RewriteCond %{REQUEST_FILENAME} !-f
  10 RewriteCond %{REQUEST_FILENAME} !-d
  11 RewriteCond %{REQUEST_FILENAME}\.html -f
  12 RewriteRule ^(.*)$ $1.html [L]
  13
  14 RewriteCond %{THE_REQUEST} ^(?:GET|POST)\ /.*\.html\ HTTP.*$ [NC]
  15 RewriteRule ^(.*)\.html$ $1 [R=301,L]