Find the code here, all Linux code so you will need to be in the Linux operating system to develop on it. There are some desktop applications you can run on your own PC.
Zunzunsite3 is the code for the site, although I had to make some changes to get it functional and have not uploaded my own repo yet. I have it on my todo list because I need to manage some private information in there.
I feel that showing the coefficients might not be very useful, because they change very fast and the user page updates slowly. Is there a reason you need to see that? Trying to speed up the process? Running on your own PC may be faster if you have more than 4 CPU cores.