Yes, we use feathericon!
I recommend several videos I made on this topic:
The technical presentation of Gladys 4:
A live coding session last week:
This can give you an idea of the project 
After that, the best thing is to launch an instance locally, you have all the front end in the « front » folder, and all the back end in the « server » folder (It’s Node.js)
Nothing too complicated, and I’m always here to lend a hand if you have trouble!