There's a group on FB called 'dog training advice and support' and they have a great file on babies and children. Highly recommend you join the group and read the file.
With dogs and newborns, it mostly about keeping them separate but not making the dog feel pushed out. So baby gates and play pens where the dogs can see/hear/smell you and baby and you can stroke him, but he can't jump all over.
Practice walking the dog and (empty) pram so he gets use to it.
Play baby noises and reassure with treats so he has a positive association.
Give him the worn baby suits to smell.
When bringing the baby home from hospital, mum should greet the dog first as he will be delighted to see her after she's been away, while dad brings in the baby calmly afterwards.
Include, don't exclude - Reward your dog for approaching the baby calmly and gently. Don't shout at him for getting it wrong or for trying to get your attention, gently show him the right way to behave.
Keep your dog busy with interactive toys like a stuffed Kong while you are busy with the baby.
Your dog will still need plenty of exercise and interaction to stop him getting bored and frustrated.
Never, ever leave dog and baby alone together.