How to set up digitalocean so that at least basic security is met?

Question

SSH

Connected, everything seems to be ok. But I have never been an admin and I would like to know how to maintain basic security? Do I need to make any settings? In general, there are manuals suitable for digital. I want to touch simple. And upload a couple of projects there

Answer 1

https://www.digitalocean.com/community/tutorials/i...
and links from it to neighboring tutorials
and I recommend the host - in my signature

Answer 2

To begin with, just cover everything that is not used with a firewall, the main thing is to allow ssh

apt-get install ufw
ufw allow ssh
ufw allow http
ufw allow https
ufw enable