In this case, a Hetzner server

sudo apt update
sudo apt upgrade

Take ~/.ssh/id_rsa.pub and paste it in `/root/.ssh/authorized_keys`

adduser vektrat

visudo

Resulting file should be like this

# User privilege specification
root    ALL=(ALL:ALL) ALL
vektrat ALL=(ALL) NOPASSWD:ALL

cp -r .ssh /home/vektrat/
chown -R vektrat .ssh
chgrp -R vektrat .ssh

Reboot and try to access via ssh with the new user

sudo vi /etc/shadow

Edit the file to remove hashed password (careful with the rest of the info)

vektrat:*:19000:0:99999:7:::

We choose to do so at the provider's location and allow those basic services:

Following those guidelines

sudo apt get install docker-compose