Etherpad

http://etherpad.org/

Configure

export DB_PASSWORD=$(openssl rand -base64 32)
echo POSTGRES_PASSWORD=$DB_PASSWORD >> .env
echo ETHERPAD_DB_PASSWORD=$DB_PASSWORD >> .env
echo ETHERPAD_TITLE=Bloc Note >> .env

(Optionnal) Add a theme

echo THEME_IMAGE=oxytanet/front-pad >> .env

Deploy

docker-compose up -d