Add Docker's official GPG key:

sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

Add the repository to Apt sources:

I've had npm instances completely implode on me before and hated having to remember all the proxy hosts. If you can still access the npm system and the sqlite file you can run this command to get a list displayed.

sqlite3 /data/database.sqlite "SELECT id, domain_names, forward_host, forward_port FROM proxy_host;"

if sqlite isn't installed (some containers use just a sqlite file), install it:

sudo apt -y install sqlite3