whens the last time you used freecad? theres literally a button for making fillets.

You will need a hardware description language (HDL). Verilog and VHDL are two very established ones but they are tricky. A newcomer is Bluespec, which is now open source so if you wanna go down that rabbit hole, I’d recommend this one.

what do you mean by docker-compose down wiping volumes? Is’nt the whole idea of linking an internal folder to one on the host machine that the data will persist even if the docker instance is destroyed?