Completely refactored examples to run only once and have multiple endpoints

examples/self-hosted/src/shared.ts

@@ -0,0 +1,41 @@
+import { promises as fs } from "fs";
+import path from "path";
+
+const certificatesCache: Partial<{
+	signerCert: Buffer;
+	signerKey: Buffer;
+	wwdr: Buffer;
+	signerKeyPassphrase: string;
+}> = {};
+
+export async function getCertificates(): Promise<typeof certificatesCache> {
+	if (Object.keys(certificatesCache).length) {
+		return certificatesCache;
+	}
+
+	const [signerCert, signerKey, wwdr, signerKeyPassphrase] =
+		await Promise.all([
+			fs.readFile(
+				path.resolve(__dirname, "../../../certificates/signerCert.pem"),
+				"utf-8",
+			),
+			fs.readFile(
+				path.resolve(__dirname, "../../../certificates/signerKey.pem"),
+				"utf-8",
+			),
+			fs.readFile(
+				path.resolve(__dirname, "../../../certificates/WWDR.pem"),
+				"utf-8",
+			),
+			Promise.resolve("123456"),
+		]);
+
+	Object.assign(certificatesCache, {
+		signerCert,
+		signerKey,
+		wwdr,
+		signerKeyPassphrase,
+	});
+
+	return certificatesCache;
+}