Added environment variabeles

#!/bin/bash

set -eu

# Docker environment variabeles

: ${HOST_SERIAL:=''}

: ${GUEST_SERIAL:=''}

permanent="DSM"

serialstart="2000"

[ ! -d "$IMG" ] && echo "Storage folder (${IMG}) not found!" && exit 69

#If environment variabele not set fall back to file

if [ -z "$HOST_SERIAL" ]; then

  FILE="${IMG}/host.serial"

  if [ ! -f "$FILE" ]; then

    SERIAL="$(echo "$serialstart" | tr ' ' '\n' | sort -R | tail -1)$permanent"$(printf "%06d" $((RANDOM % 30000 + 1)))

    echo $SERIAL > "$FILE"

  fi

  HOST_SERIAL=$(cat "${FILE}")

fi

#If environment variabele not set fall back to file

if [ -z "$GUEST_SERIAL" ]; then

  FILE="${IMG}/guest.serial"

  if [ ! -f "$FILE" ]; then

    SERIAL="$(echo "$serialstart" | tr ' ' '\n' | sort -R | tail -1)$permanent"$(printf "%06d" $((RANDOM % 30000 + 1)))

    echo $SERIAL > "$FILE"

  fi

  GUEST_SERIAL=$(cat "${FILE}")

fi

: ${HOST_BUILD:='42962'}

: ${HOST_VERSION:='2.6.1-12139'}

: ${HOST_TIMESTAMP:='1679863686'}

: ${HOST_SERIAL:='0000000000000'}

: ${GUEST_SERIAL:='0000000000000'}

: ${GUEST_UUID:='ba13a19a-c0c1-4fef-9346-915ed3b98341'}

CPU=$(lscpu | sed -nr '/Model name/ s/.*:\s*(.*) @ .*/\1/p' | sed ':a;s/  / /;ta' | sed s/"(R)"//g | sed s/"-"//g | sed 's/[^[:alnum:] ]\+//g')

./run/serial.bin -cpu="${CPU_CORES}" \

		 -cpu_arch="${CPU}" \

                -buildnumber=42962 \

                -vmmts=1679863686 \

		 -hostsn="${HOST_SERIAL}" \

		 -guestsn="${GUEST_SERIAL}" \

                -vmmversion="2.6.1-12139" \

                -guestuuid="ba13a19a-c0c1-4fef-9346-915ed3b98341" > /dev/null 2>&1 &

		 -vmmts="${HOST_TIMESTAMP}" \

		 -vmmversion="${HOST_VERSION}" \

		 -buildnumber="${HOST_BUILD}" \

		 -guestuuid="${GUEST_UUID}" > /dev/null 2>&1 &

KVM_SERIAL_OPTS="\

	-serial mon:stdio \