The script for quick setup PostmarketOS for Docker.

install.sh

#!/bin/ash
#
# The script for quick setup PostmarketOS for Docker.
# We need internet connection only.
#
# Install from sudo like:
# $> wget -O - <SCRIPT_URL> | sudo ash

if [[ $(id -u) -ne 0 || -z "$SUDO_USER" ]] ; then echo "Please run from sudo" ; exit 1 ; fi
TARGET_USER=${SUDO_USER}

# Check internet connection. Restart NetworkManager if failed
if ! wget -q --spider http://google.com; then
  echo "No internet connection, trying to setup..."
  rc-service networkmanager restart
  nmtui
  while ! wget -q --spider http://google.com; do
    echo "Waiting for internet connection..."
    sleep 1
  done
fi

# Autologin
#sed -i "s/sbin\/getty 38400 tty1/sbin\/agetty --autologin $TARGETUSER --noclear 38400 tty1/" /etc/inittab

# Brightness. Works at kernel fork only yet
echo 0 > /sys/class/backlight/lcd-backlight/brightness

apk update
apk upgrade
apk add curl vim git htop upower libcgroup docker

# Set MAC at boot. Only for OnePlus (bacon)
read -r -d '' FILECONTENT <<'ENDFILECONTENT'
#!/sbin/openrc-run
command=/sbin/ip
command_args="link set dev wlan0 address be:3c:4e:4e:74:97"

description="WLAN hw-addr setter"

depend() {
  before networkmanager
}
ENDFILECONTENT
echo "$FILECONTENT" > /etc/init.d/wlanhwaddr
chmod 755 /etc/init.d/wlanhwaddr
rc-update add wlanhwaddr default

# nftables for Docker
read -r -d '' FILECONTENT <<'ENDFILECONTENT'
table inet filter {
    chain input {
        iifname "wlan*" accept comment "Allow incoming network traffic from WLAN"
      }
    chain forward {
        iifname "wlan*" accept comment "Allow outgoing network traffic from WLAN through us"
        ct state {established, related} counter accept comment "accept established connections"
      }
    }
ENDFILECONTENT
echo "$FILECONTENT" > /etc/nftables.d/52_wlan_inet.nft
rc-service nftables restart

# Preparing /sdcard
mkdir /sdcard
mount PARTLABEL=userdata /sdcard
while ! mountpoint -q /sdcard; do
  echo "Wait for mount /sdcard"
  sleep 1
done

mkdir /sdcard/media
mkdir /sdcard/media/home
mkdir /sdcard/media/docker
chmod 755 /sdcard/media /sdcard/media/home /sdcard/media/docker

# Prepare our filesystem
mv /home /home.bak
mkdir /home
mkdir /var/lib/docker

read -r -d '' FILECONTENT <<'ENDFILECONTENT'
# <device>            <dir>             <type> <options>                               <dump> <fsck>
PARTLABEL=userdata    /sdcard           ext4   rw,user,suid,dev,exec,auto,users,async  0      2
/sdcard/media/home    /home             none   bind                                    0      0
/sdcard/media/docker  /var/lib/docker   none   bind                                    0      0
ENDFILECONTENT
echo "$FILECONTENT" > /etc/fstab

mount -a
while ! mountpoint -q /home; do
  echo "Wait for mount /home. If failed you should rename /home.bak to /home explicitly"
  sleep 1
done
cp -r -p /home.bak/* /home

rc-update add localmount default

# Prepare Docker
usermod -aG docker ${TARGET_USER}
rc-update add docker
rc-service docker start
while [ ! -S /var/run/docker.sock ]; do
  sleep 1
done
sleep 2

# Prepare Docker for Prometheus
readonly DOCKER_GATEWAY_HOST=$(ip addr show docker0 | awk '/inet / {print $2}' | head -n1 | cut -f1 -d '/')
cat > /etc/docker/daemon.json <<EOF
{
  "metrics-addr" : "${DOCKER_GATEWAY_HOST}:9323",
  "experimental" : true
}
EOF

rc-service docker reload

docker swarm init --advertise-addr wlan0

The brightnes line is not workuing for me. I could See that in class the brightness is not avalible in mainline kernel. The upstrem has the brightnes in a other class folder... Is there something which needs to be updated? @valentino-sm

Is there something which needs to be updated? @valentino-sm

@MasterPlexus Yep. This patch is needed for backlight support:
msm8974-mainline/linux#2
Patching the kernel is non-trivial task, however it will work if you deal with it.

Thanks. In between I've seen your patch. Unfortunately when I compare it to the current mainline source, I did not find the corresponding file, which you have patched...
I see the backlight switch as important, as it makes no Sense to let it on, even the phone should only run as a kind of server... So any help on that will be very appreciated ;)