title: Running flipper with expo sdk43
body: <p>I'm following the instruction in this tweet from an expo dev so that I can use flipper for debugging a bare workflow expo RN app. <a href="https://twitter.com/Baconbrix/status/1412923662546608130" rel="nofollow noreferrer">https://twitter.com/Baconbrix/status/1412923662546608130</a></p>
  <ol>
  <li>I installed flipper on windows per the docs.</li>
  <li>Running an emulator with android studio.</li>
  <li>The emulator appears in the flipper desktop app.</li>
  <li>Added the following to my <code>app.json</code></li>
  </ol>
  <pre class="lang-json prettyprint-override"><code> &quot;extra&quot;: {
      &quot;flipperHack&quot;: &quot;React Native packager is running&quot;
    }
  </code></pre>
  <ol start="5">
  <li>Ran <code>expo start METRO_SERVER_PORT=19000 -a Flipper.app</code></li>
  </ol>
  <p>I get the following error:</p>
  <pre><code>The expected package.json path: D:\dev\repos\foretold\foretold-react-native\Flipper.app\package.json does not exist
  </code></pre>
  <p>What am I missing?</p>