title: Firebase Storage Post rules apply to Delete rules
body: <p>This are my rules, applied to an img dir:</p>
  
  <pre><code>match /img {
    match /{fileId} {
      allow read, 
            write: if request.resource.contentType.matches('image/jpeg')
                   || request.resource.contentType.matches('image/png')
                   || request.resource.contentType.matches('image/gif')
                   &amp;&amp; request.resource.size &lt; 2 * 1024 * 1024
      }
    }
  }
  </code></pre>
  
  <p>The problem is that those rules are also being applied to delete() as it is a write method too, so it always returns a permission error. I couldn't find anything in the documentation regarding this. How can I defer from POST/PUT rules and DELETE rules?</p>