docker run apache from api plateform

run.sh

#!/bin/bash

##
# Detect the ownership of the webroot
# and run apache as that user.
#
main() {
    # Docker for Mac requires a special handling, see https://docs.docker.com/docker-for-mac/osxfs/#/ownership
    if [[ -n $(mount -t fuse.osxfs | grep /app) ]]; then
        chown -R www-data:www-data /app 2> /dev/null
        exec /usr/sbin/apache2ctl "$@"
        return
    fi

    local owner group owner_id group_id tmp
    read owner group owner_id group_id < <(stat -c '%U %G %u %g' .)
    if [[ $owner = UNKNOWN ]]; then
        owner=$(randname)
        if [[ $group = UNKNOWN ]]; then
            group=$owner
            addgroup --system --gid "$group_id" "$group"
        fi
        adduser --system --uid=$owner_id --gid=$group_id "$owner"
    fi
    tmp=/tmp/$RANDOM
    {
        echo "User $owner"
        echo "Group $group"
        grep -v '^User' /etc/apache2/apache2.conf |
            grep -v '^Group'
    } >> "$tmp" &&
    cat "$tmp" > /etc/apache2/apache2.conf &&
    rm "$tmp"
    # Not volumes, so need to be chowned
    chown -R "$owner:$group" /var/{lock,log,run}/apache*
    exec /usr/sbin/apache2ctl "$@"
}

##
# Generate a random sixteen-character
# string of alphabetical characters
randname() {
    local -x LC_ALL=C
    tr -dc '[:lower:]' < /dev/urandom |
        dd count=1 bs=16 2>/dev/null
}

main "$@"