Clean droplet
First command apt-get update on root user fails
Removing /var/lib/apt/lists/* and cleaning apt-get clean doesn’t fix the problem
Adding 8.8.8.8 DNS doesn’t either
I’m using IPV6
Pings to 8.8.8.8 work

$ sudo apt-get update
0% [Working]
Err:1 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Could not resolve host: repos.insights.digitalocean.com
Err:2 http://mirrors.digitalocean.com/ubuntu xenial InRelease
Temporary failure resolving 'mirrors.digitalocean.com'
Err:3 http://security.ubuntu.com/ubuntu xenial-security InRelease
Temporary failure resolving 'security.ubuntu.com'
0% [Working]

What’s going on?