App.tsx: Remove headers in request

src/App.tsx

@@ -121,16 +121,10 @@ class App extends React.Component<IAppProps> {
 
 async function fetchConfiguration(): Promise<Configuration> {
   const url = `${import.meta.env.VITE_API_URL}`;
-  const myHeaders = new Headers({
-    'Content-Type': 'application/json'
-  });
 
-  const myInit = {
-    method: 'POST',
-    headers: myHeaders
-  };
-
-  return await fetch(url, myInit)
+  return await fetch(url, {
+    method: 'POST'
+  })
     .then((response) =>
       response.json()
     ) as Configuration;

test-server/http.js

@@ -37,8 +37,7 @@ serve({
         status: 200,
         headers: {
           'Content-Type': 'application/json',
-          'Access-Control-Allow-Origin': '*',
-          'Access-Control-Allow-Headers': '*'
+          'Access-Control-Allow-Origin': '*'
         }
       });
     }
@@ -47,8 +46,7 @@ serve({
       status: 200,
       headers: {
         'Content-Type': 'text/plain',
-        'Access-Control-Allow-Origin': '*',
-        'Access-Control-Allow-Headers': '*'
+        'Access-Control-Allow-Origin': '*'
       }
     });
   }