*Add method to check if we are in staging mode for ssl

src/relay.ts

@@ -30,8 +30,7 @@ const sslParams: tls.SecureContextOptions = { cert: "", key: "" };
 const sslPrivateKey = await acme.forge.createPrivateKey();
 const acmeClient = new acme.Client({
   accountKey: sslPrivateKey,
-  directoryUrl:
-    config.str("ssl-mode") === "staging"
+  directoryUrl: isSSlStaging()
     ? acme.directory.letsencrypt.staging
     : acme.directory.letsencrypt.production,
 });
@@ -227,3 +226,7 @@ function getSeed(): Uint8Array {
 
   return seed;
 }
+
+function isSSlStaging() {
+  return config.str("ssl-mode") === "staging";
+}