Apache svn - how to customize rendering?

I installed svn on Ubuntu 16.04.3 LTS using the following how-to
webpage:
https://tecadmin.net/install-subversion-server-on-ubuntu/#

Then I have migrated my CVS repositories to svn using cvs2svn and it
seems like all code has come though even though my cvs modules
definitions have not so I have to manually recreate the externals.

When I browse the repositories with my web browser it really looks
pretty basic with just a vertical one-column list of files/directories
shown in browser default font. Is there some way to enhance/customize
it a bit so it gets a more attractive look?

With CVS we have used ViewCVS, which has a more informative display
when browsing the repository also including navigation help and file
info. Could Apache Svn be configured to display anything similar to
what VieCVS could do back in 2005?

Or do I have to install VieVC and in that case how would it affect the
existing Apache Svn?

-- 
Bo Berglund
Developer in Sweden