Updated backend to make sure it works properly with frontend. Fixed one frontend issue (free heap was not correctly named)

Provider/frontend/src/lib/api.js

@@ -17,7 +17,11 @@ export async function getSystemInfo() {
     if (!res.ok) {
         throw new Error(`HTTP ${res.status}: ${res.statusText}`);
     }
-    return res.json();
+    const data = await res.json();
+    return {
+        ...data,
+        freeHeap: data.free_heap
+    };
 }
 
 /**