fix process is not defined error

index.html

@@ -33,6 +33,9 @@
       content="https://gacha.counterfire.games/images/counter.png"
     />
   </head>
+  <script>
+    window.process = { browser: true, env: { ENVIRONMENT: 'BROWSER' } };
+  </script>
   <script type="module">
     import { Buffer } from "buffer";
     window.Buffer = Buffer;