title: Google Firestore: Query on substring of a property value (text search)
body: <p>I am looking to add a simple search field, would like to use something like</p>
  
  <p><code>collectionRef.where('name', 'contains', 'searchTerm')</code></p>
  
  <p>I tried using <code>where('name', '==', '%searchTerm%')</code>, but it didn't return anything.</p>