I was using mydomain,com/project but I also wanted to be able to use mydomain.com. Any help please?

I have tried to place .htaccess in /opt/openproject/public and configured redirection but still not working.

I tried this .htaccess:

RewriteEngine on
RewriteRule ^project/(.*)$ /$1 [R=301,L]

I also tried this: 

RewriteEngine on
RewriteRule ^$ project /

Not that /opt/openproject/public is autoconfigured in apache virtual host as the root directory.

Please any help will be appreciated.