Auto renew Let's Encrypt throw Docker

docker-letsencrypt-renew.sh

#!/bin/bash

#
# Author:       SuperPaintman <SuperPaintmanDeveloper@gmail.com>
#

###
# Constants
###
RETVAL=0

CCYAN="\033[0;36m"
CGREEN="\033[0;32m"
CBLUE="\033[0;34m"
CGRAY="\033[1;30m"
CNC="\033[0m"

docker_container_name="letsencrypt"

update_domain () {
    local config_file=$1

    echo -e "${CGREEN}Start${CNC} ${CBLUE}${config_file}${CNC}"

    docker run --name $docker_container_name \
        --rm \
        -v /etc/letsencrypt:/etc/letsencrypt \
        -v /usr/share:/ust/share \
        -v /var/www/letsencrypt:/var/www/letsencrypt \
        quay.io/letsencrypt/letsencrypt auth --config "$config_file" --keep --renew-by-default
}

if [ "$1" ] ; then
    # Config from argv
    update_domain "$1"
else
    # Config from etc

    array=($(find /etc/letsencrypt/configs/*.ini -type f))

    for element in "${array[@]}" ; do
        update_domain "$element"
    done
fi

echo -e "${CGREEN}Restart Nginx${CNC}"
docker restart nginx

exit $RETVAL