title: I can't load model from file:// with @tensorflow/tfjs
body: <p>I am building an npm package that loads a pretrained tensorflow model and makes some prediction. </p>
  
  <p>When i do <code>tf.loadLayersModel()</code> with <code>tf = require('@tensorflow/tfjs-node')</code> i have no problem. Unfortunately, that library seem problematic upon installation. 
  I tried using instead <code>tf = require('@tensorflow/tfjs)</code>. Although, i get the following error:</p>
  
  <p>UnhandledPromiseRejectionWarning: Error: browserHTTPRequest is not supported outside the web browser without a fetch polyfill.</p>
  
  <p>This is my code:</p>
  
  <pre><code> // Load ML model
    tf.loadLayersModel("file://" + __dirname + "mymodel/model.json").then(
      model =&gt; {
        }
      }
    );
  </code></pre>
  
  <p>Is there a way i can work this around?.</p>