2d Spaceship editor?

I want to create a 2d spaceship editor for my game, so I can add some information to different spaceship. For example, where is the engine of the ship, where is the weapon relative to my spaceship. And export to a config file in json.

Maybe I could add some shapes to my spaceship sprites and mark that shape as weapons or engine and etc.

just like this A ship editor for starsector

But dont know how to get start, any ideas? Many thanks!