Fixed missing __dirname in all the self-hosted examples

examples/self-hosted/src/setExpirationDate.ts

@@ -8,10 +8,13 @@
  */
 
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { PKPass } from "passkit-generator";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 app.route("/expirationDate/:modelName").get(async (request, response) => {
 	if (!request.query.fn) {
 		response.send(