Switch Py3 Dockerfile to use new 'girder serve' command
Switch Py3 Dockerfile to use new 'girder serve' command

data-exp-lab/girder,Kitware/girder,kotfic/girder,RafaelPalomar/girder,RafaelPalomar/girder,kotfic/girder,kotfic/girder,jbeezley/girder,data-exp-lab/girder,Kitware/girder,kotfic/girder,manthey/girder,Kitware/girder,manthey/girder,girder/girder,Xarthisius/girder,data-exp-lab/girder,RafaelPalomar/girder,girder/girder,jbeezley/girder,Xarthisius/girder,manthey/girder,girder/girder,Xarthisius/girder,data-exp-lab/girder,RafaelPalomar/girder,manthey/girder,Xarthisius/girder,girder/girder,jbeezley/girder,Kitware/girder,data-exp-lab/girder,kotfic/girder,jbeezley/girder,RafaelPalomar/girder,Xarthisius/girder