Update installation.rst
Update installation.rst

updated the docker install to be a tiny bit more verbose and not tell people to use sudo while making
gdestuynder/MozDef,Phrozyn/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,ameihm0912/MozDef,ameihm0912/MozDef,gdestuynder/MozDef,jeffbryner/MozDef,ameihm0912/MozDef,mpurzynski/MozDef,mozilla/MozDef,ameihm0912/MozDef,gdestuynder/MozDef,jeffbryner/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,gdestuynder/MozDef,mozilla/MozDef,mozilla/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,jeffbryner/MozDef,jeffbryner/MozDef,mozilla/MozDef