feat: Limit CPU_CORES to amount of physical cores (#1015)

[ -n "${CPU_CORES//[0-9 ]}" ] && error "Invalid amount of CPU_CORES: $CPU_CORES" && exit 15

if [ "$CPU_CORES" -gt "$CORES" ]; then

  warn "The amount for CPU_CORES (${CPU_CORES}) exceeds the amount of physical cores, so will be limited to ${CORES}."

  CPU_CORES="$CORES"

fi

# Check system

if [ ! -d "/dev/shm" ]; then