Sharing DB files among team members is a bad sign and i have seen people losing their job by doing this because one day they destroyed part of the real DB. So please don't do this for your own good.
I highly recommend to play with dummy data by using migrations and seeds. Also you can create a Docker container and provide a solid development environment for your team members. So with a couple of commands or a make file the whole environment can start, reset etc without having to share DB files with others.