Dockerfile/debian/example/docker-entrypoint.sh

#!/bin/bash
set -e

echo "Container's IP address: `awk 'END{print $1}' /etc/hosts`"

if [ "$1" = 'server' ]; then
    ./examples/server/$@ -bi
else
    if [ "$1" = 'client' ]; then
        ./examples/client/$@
    else
        exec "$@"
    fi
fi