deb http://archive.debian.org/debian/ stretch main
deb-src http://archive.debian.org/debian/ stretch main

deb http://archive.debian.org/debian-security stretch/updates main
deb-src http://archive.debian.org/debian-security stretch/updates main

# stretch-updates, previously known as 'volatile'
deb http://archive.debian.org/debian/ stretch-updates main
deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
# deb-src [arch=amd64] https://download.docker.com/linux/debian stretch stable
deb-src http://archive.debian.org/debian/ stretch-updates main