check if remote url is defined first (#2384)

Author: tcm390

agent/src/index.ts

@@ -1101,9 +1101,10 @@ const checkPortAvailable = (port: number): Promise<boolean> => {
     });
 };
 
-const hasValidRemoteUrls = () =>
-    process.env.REMOTE_CHARACTER_URLS != "" &&
-    process.env.REMOTE_CHARACTER_URLS.startsWith("http")
+const hasValidRemoteUrls = () => {
+    const remoteUrls = process.env.REMOTE_CHARACTER_URLS;
+    return remoteUrls && remoteUrls !== "" && remoteUrls.startsWith('http');
+};
 
 const startAgents = async () => {
     const directClient = new DirectClient();