Fixed running docker script from within pwd containing spaces
Fixed running docker script from within pwd containing spaces

8devices/pi-gen,KingBrewer/pi-gen,cfstras/pi-gen,drothmaler/pi-gen,rkubes/pi-gen,RPi-Distro/pi-gen,brindosch/pi-gen,barnacleos/build,DigitaleGesellschaft/pi-gen,BlokasLabs/modep,jacen92/pi-gen,WLANThermo/pi-gen,timcoote/Pumpkin-gen,timcoote/Pumpkin-gen,BlokasLabs/modep,timcoote/Pumpkin-gen