title: Initializing firebase CLI Features in an existing Firebase project directory
body: <p>I am trying to add features "Hosting" into a Firebase project file which has  already installed Functions. </p>
  
  <p>So I want to know if I can do this with Firebase Init. or this will erase my existing firebase function. Is there anyway that I can do this without erasing my Firebase Functions. </p>
  
  <p>And, in order to use firebase function, do I have to install Database as well? Or just Functions and Hosting. </p>
  
  <p>Thank you.</p>