So if you have gone trough reading all the projects log and you wanna collaborate, or build a DEMETRA SYSTEM by your own you can find the server side and the client side app on GitHub.
Pay attention that if you decide to run it you have to manage to install a NODEJS server on your RPI than you can clone the server side code and manage to install all the dependencies by running
npm installand now you should good to go with the server parts.
DEMETRA CLIENT APP
For the client app you have two choices basically
First is to download the latest .apk for you Android only wich is the latest build relased full compatible with the server, or you can go and build your own.