To run a local instance of the service (without persistent data!!) you can use the following commands.
A docker container based on the currently checked out working tree will be build (and named opensplit-backend:latest). You can then start the server by invoking the second command. The config.py.example file will be used in the below command. Replace that part with your custom config file, if needed.
docker build -t opensplit-backend .
docker run --rm -v $(pwd)/config.py.example:/code/config.py:ro -p 5000:5000 -it opensplit-backend:latest