[Docker] Bump to Node.js 22 (#6222)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

test/test-backend.mjs

@@ -0,0 +1,12 @@
+import * as childProcess from "child_process";
+
+const version = parseInt(process.version.slice(1).split(".")[0]);
+
+/**
+ * Since Node.js 22 introduced a different "node --test" command with glob, we need to run different test commands based on the Node.js version.
+ */
+if (version < 22) {
+    childProcess.execSync("npm run test-backend-20", { stdio: "inherit" });
+} else {
+    childProcess.execSync("npm run test-backend-22", { stdio: "inherit" });
+}