docker-mods-uptime-kuma-timeout-fix/root/etc/cont-init.d/98-docker-in-docker

#!/usr/bin/with-contenv bash

ABC_USER=$(id -nu ${PUID:-911})
mkdir -p /config/{logs/dockerd,var/lib/docker}
chown -R ${ABC_USER}:${ABC_USER} /config/logs

echo "**** installing docker and docker compose ****"
if [ -f /usr/bin/apt ]; then
    DISTRONAME="ubuntu"
    apt-get install -y \
        btrfs-progs \
        ca-certificates \
        curl \
        e2fsprogs \
        iptables \
        openssh-client \
        openssl \
        pigz \
        xfsprogs \
        xz-utils
else
    DISTRONAME="alpine"
    apk add --no-cache \
        btrfs-progs \
        curl \
        e2fsprogs \
        e2fsprogs-extra \
        ip6tables \
        iptables \
        openssl \
        pigz \
        xfsprogs \
        xz
fi
ARCH=$(uname -m)
if [ -f "/docker-compose-${DISTRONAME}/docker-compose_${ARCH}" ] ; then
    echo "Copying over docker and docker-compose binaries"
    mv "/docker-compose-${DISTRONAME}/docker-compose_${ARCH}" /usr/local/bin/docker-compose
    chmod +x /usr/local/bin/docker-compose
    rm -rf /docker-compose-ubuntu /docker-compose-alpine
    tar xf /docker-tgz/docker_${ARCH}.tgz \
        --strip-components=1 -C \
        /usr/local/bin/
    rm -rf /docker-tgz
else
    echo "**** docker and docker-compose already installed, skipping ****"
fi

# delete PID if exists
find /run /var/run -iname 'docker*.pid' -delete || :

# create docker group and add abc to it
groupadd -f docker
if ! id -nG ${ABC_USER} | grep -q "docker"; then 
    usermod -aG docker ${ABC_USER}
fi