You shouldn't use BETA versions for production, as too many things can go wrong. It's always best to wait until the stable version is released.
I do know that you will be able to upgrade from 5.7 to 5.8 when it's released, so you might want to just use 5.7.5.9, then upgrade to 5.8 when it's available.
I do know that you will be able to upgrade from 5.7 to 5.8 when it's released, so you might want to just use 5.7.5.9, then upgrade to 5.8 when it's available.