Since my memory was constantly running full, I had to create a swapspace.
After the reboot, my server is suddenly giving me a 403 on Apache.

What can I verify:
/var/www (and all underneath) = www-data:www-data
They have the proper CHMOD setting (755, or else where needed inside the /var/www folder and “below”)

Is there anything else I can check to get this back up and running? This is really frustrating.

In my project window from DO I also get:
Not receiving metric data. Last working 2 hours ago