Something

<VirtualHost *:80>
  ServerName if.nobletdesign.com
  DocumentRoot "/srv/htdocs/ndg_beta/websites/institue/web"
  <Directory "/srv/htdocs/ndg_beta/websites/institue/web">
        Options +FollowSymLinks +ExecCGI

        <IfModule mod_rewrite.c>
          RewriteEngine On

          # we skip all files with .something
          RewriteCond %{REQUEST_URI} \..+$
          RewriteCond %{REQUEST_URI} !\.html$
          RewriteRule .* - [L]

          # we check if the .html version is here (caching)
          RewriteRule ^$ index.html [QSA]
          RewriteRule ^([^.]+)$ $1.html [QSA]
          RewriteCond %{REQUEST_FILENAME} !-f

          # no, so we redirect to our front web controller
          RewriteRule ^(.*)$ index.php [QSA,L]
        </IfModule>

        # big crash from our front web controller
        ErrorDocument 500 "<h2>Application error</h2>symfony application failed to start properly"

  </Directory>
</VirtualHost>