start.sh

#!/bin/bash

PORT=${PORT:-8081}
LISTEN=${LISTEN:-127.0.0.1}

# determine the docker executable name
if which docker; then DOCKER='docker'
else DOCKER='docker.io' ; fi # debian default

# check that docker is installed
if ! sudo $DOCKER --version ; then
    echo 'install docker first...' ; exit 1
fi

# make output verbose
set -o xtrace -o nounset

# set the random_key if not already set
HASH=$(cat /dev/urandom | tr -dc 'a-f0-9' | fold -w 48 | head -n 1)
sed -i "s/{{RANDOM_KEY}}/${HASH}/g" ./roundcube/config.inc.php

# 0. Create roundcube-data container to host only data
sudo $DOCKER ps -a | grep 'roundcube-data'
if [ "$?" -ne 0 ] ; then
    echo 'launching instance of roundcude-data'
    sudo $DOCKER run -v /rc --name roundcube-data busybox mkdir -p /rc
fi

# 1. Create image with roundcube
sudo $DOCKER build -t thinred/roundcube ./roundcube

# 2. Start it and attach rc-data volumes
sudo $DOCKER run -p ${LISTEN}:${PORT}:80 --volumes-from roundcube-data -d --name roundcube thinred/roundcube