Personalization of an existing docker image

mydocker

#!/bin/bash

IMAGE=local/ubuntu-dev:16.04
NAME=mydocker
LANG=C.UTF-8
DIR=`dirname $0`
SETUP=mydocker-setup
SETUP_CMD=/root/${SETUP}
HOST_UID=`id -u`
HOST_GID=`id -g`
HOST_UNAME=`id -un`

docker run -it --rm \
        --name ${NAME} \
        --mount "type=bind,src=${HOME},dst=${HOME}" \
        --mount "type=bind,src=${DIR}/${SETUP},dst=${SETUP_CMD}" \
        -u root \
        -w ${HOME} \
        -e HOME=${HOME} \
        -e LANG=${LANG} \
        -e HOST_UID=${HOST_UID} \
        -e HOST_GID=${HOST_GID} \
        -e HOST_UNAME=${HOST_UNAME} \
        ${IMAGE} \
        ${SETUP_CMD}

mydocker-setup

#!/bin/bash

echo "${HOST_UNAME} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/90-user
groupadd -o -g ${HOST_GID} ${HOST_UNAME}
useradd -o -u ${HOST_UID} -g ${HOST_GID} ${HOST_UNAME}
exec su - ${HOST_UNAME}