Merge branch 'lh-update-docker-img' into 'develop'

switch to python3

See merge request R3/school/courses!180

contribute.sh

@@ -30,5 +30,5 @@ then
 fi
 
 # launch the docker file
-cmd="python contribute.py --date=\"$parameterDate\" --name=\"$parameterName\""
+cmd="python3 contribute.py --date=\"$parameterDate\" --name=\"$parameterName\""
 docker run -p $dockerPort:$dockerPort --user $(id -u):$(id -g) -it -v $(pwd)/:/presentation $dockerImg /bin/bash -c "$cmd"