Hello, Dušan! I hope you can get your predator problem sorted. I think covered runs are the most fool-proof method to prevent aerial attacks. You could definitely get some good ideas to deal with your goshawk problem by posting in the Predators & Pests Forum.
Thanks for joining and welcome to BackYard Chickens!
I do hope you find a way to prevent hawks there. We have free ranging chickens and if they stay center, they're protected by guy wires from a tower, but away from there we have wind spinners and things like our camper, a picnic table, etc. that they can duck under. We have a few roosters and a Corgi dog that will warn them.
Definitely post in the link above that @Jener8or posted too with pictures of your layout and you'll get lots of ideas!
to have you here with us. Enjoy your time here at BYC!
