Use Kibana for pull request statistics.
Start by creating the data directory with the correct permissions:
mkdir .elasticsearch
And then bring up kibana/elasticsearch:
docker-compose up
Run the indexing script (you can index multiple repositories):
docker-compose exec python ./script/index --user your-username --password your-password repo1 repo2
And voila! Now you can open Kibana in your browser at localhost:5601.