title: How to get image from firebase-storage in ionic 3
body: <p>Here is my storage (set manually in firebase ) who contain bottle photo.</p>
  
  <p><a href="https://i.stack.imgur.com/56Dta.png" rel="nofollow noreferrer">https://i.stack.imgur.com/56Dta.png</a></p>
  
  <p>here is my Database (bottle with several properties) but without his picture</p>
  
  <p><a href="https://i.stack.imgur.com/j1eBS.png" rel="nofollow noreferrer">https://i.stack.imgur.com/j1eBS.png</a></p>
  
  <p>My questions are, </p>
  
  <p>how to get my bottle photo by storage (firebase-storage doc didn't help me) ? 
  do I proceed correctly ?  </p>
  
  <p>thanks for reading me !</p>