applied copilot suggestions to the pr

Author: levhitaIncode

.nvmrc

@@ -0,0 +1 @@
+22

example_backend.js

@@ -96,7 +96,7 @@ const finishStatus = async function (token) {
 
   let response;
   try {
-    response = await fetch(url, { method: "POST", body: "{}", headers: sessionHeaders });
+    response = await fetch(url, { method: "POST", body: JSON.stringify({}), headers: sessionHeaders });
     if (!response.ok) {
       throw new Error("Request failed with code " + response.status);
     }
@@ -116,7 +116,7 @@ const setStatusClosed = async function (token) {
 
   let response;
   try {
-    response = await fetch(url, { method: "POST", body: "{}", headers: sessionHeaders });
+    response = await fetch(url, { method: "POST", body: JSON.stringify({}), headers: sessionHeaders });
     if (!response.ok) {
       throw new Error("Request failed with code " + response.status);
     }

main.js

@@ -86,7 +86,6 @@ async function getResults() {
         results.isValid ? "✓ VALID" : "✗ INVALID"
       }</span></p>
     `;
-    document.getElementById("get-results-btn").addEventListener("click", getResults);
   } catch (e) {
     showError(e);
   }

package-lock.json

@@ -14,5 +14,8 @@
   },
   "dependencies": {
     "dotenv": "^17.3.1"
+  },
+  "engines": {
+    "node": "^20.19.0 || >=22.12.0"
   }
 }