The hackbank consist of a php front-end that communicates with a python back-end over mqtt.
You need python, paho-mqtt-client and apache+php.
To install the python dependencies, run 'pip install -r requirements.txt'.
Data is stored in 'data'. In production it is also committed to git, but for
local development it's probably better to use fake data and keep it out of git.
To get started, copy the files from fakedata.
If you don't want to install apache and an mqtt server yourself you can use
docker-compose for local development. Simply running docker-compose up will
start an mqtt server on port 1883, an apache+php server serving the files in
'www' on port 4242, and hook
them up to each other. All that's left is to run kassa.py and point your
browser at http://localhost:4242