Install Orb on Alpine Linux

These instructions are for installing Orb on Alpine Linux.

Add the Orb repository and key

echo https://pkgs.orb.net/stable/alpine | tee -a /etc/apk/repositories
wget -O /etc/apk/keys/packages@orb.net.rsa.pub https://pkgs.orb.net/stable/alpine/orb.pub

Update package list and install Orb

apk update
apk add orb

Install Orb update service

/usr/bin/orb-update install