Linux/Apache File Ownership/Permissions

I'm setting up an Ubuntu server - and have everything working well.  I want to ensure, however, that I have the file ownership and permissions set properly.

The site is a Drupal 8 site, so the only files that need to be writeable by the web-user are located in /sites/default/files

Currently - everything in the site has the ownership of root.  Should ownership of everything in the public_html folder be changed to the apache username of www-data from root?

Then - for the files/directories that need to be writeable to by the CMS - should those then be set to something like 644 - with the directories being 755?

I'm a little new with the sysadmin stuff.  Any help would be appreciated!
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erzoolanderAsked:
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Rick HobbsRETIREDCommented:
No need to change ownership from root.  The writable files and dirs should work perfectly at 644 and 755 respectively.

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