title: PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted
body: <p>Can someone explain to me a little bit more detailed how can I fix this?</p>
  <p>I am trying to get lighthouse pack for graphql-playground.</p>
  <p>I have tried this but does not work said can't find this composer.phar</p>
  <pre><code> php composer.phar COMPOSER_MEMORY_LIMIT=-1 require nuwave/lighthouse
  </code></pre>