challenge wip
print ai moves
Merge branch 'master' into challenge

* master:
  print ai moves
  add nginx and hosts config to the readme
  show more interresting current games
  mr "मरा" translation #2526. Author: गिरीश.
  nb "Norsk bokmål" translation #2524. Author: Anonymous.
  lv "latviešu valoda" translation #2523. Author: krauzand.
complete challenge implementation
one cannot challenge when blocked
decline challenges
review AI logging
fix site header in dark theme