Please help save my dog’s leg after hit and run

Hi, my name is Caroline & I’m asking for help with my sweet dog Jack. My family rescued him last year after he had been neglected and abused by his previous owners. Despite his past he is the sweetest dog I’ve ever met, he just constantly wants to be with people and is always smiling. This morning he got out and was hit. Thankfully his back leg is the worst of his injuries but it was torn up very badly and almost completely detached. Through all of this his spirit is just as bright as ever. His life has been so hard already we just want him to be able to run around and play again. The surgery to repair his leg is unfortunately more than we can afford, if you can help in anyway we would be extremely grateful. Please help us get Jack back to the life he so desperately deserves!