[OSGeo] #3052: Upgrade pretalx to latest version

[OSGeo]

#3052: Upgrade pretalx to latest version
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 Reporter:  robe      |       Owner:  sac@…
     Type:  task      |      Status:  new
 Priority:  normal    |   Milestone:  Sysadmin Contract 2024-I
Component:  SysAdmin  |  Resolution:
 Keywords:            |
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Comment (by robe):

 I was able to building the package with the two plugins we had pretalx-
 pages, public-voting upgrade staging to 2024.1.0 and also the ubuntu from
 20.04 to 22.04.

 To do so, I built the base image instead of pulling it from
 hub.docker.com.  For some reason, when I tried to pull from
 hub.docker.com, I got an error about subguids (I think a limitation of
 running docker within a container).  Not sure why I never have had the
 issue with other docker images.  But building the base image from scratch,
 using that to install the plugins, and pushing to docker.osgeo.org worked
 fine and I was able to pull and install.

 At a glance it seems okay but not much data in staging to tell.  I'll
 upgrade production later today.

 I'm going to upgrade
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3052#comment:4>
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