title: How to add new custom fontFamily to react native from server after build a release?
body: <p>I have an application that has some custom fontFamilies; Users can select them and fontFamily of text will change, now I want to change this strategy and put fonts on my server to add/remove them whenever I want.
  So, I can download and save them with react-native-fs but I can't use them, how can I achieve this?
  Thank you</p>