fix(servertools): Fix compression stream creation returns, handler proxy buffer conversion, and sitemap URL concatenation

ts/servertools/classes.handlerproxy.ts

@@ -41,10 +41,11 @@ export class HandlerProxy extends Handler {
       }
 
       let responseToSend: Buffer = proxiedResponse.body;
-      if (typeof responseToSend !== 'string') {
-        console.log(proxyRequestUrl);
-        console.log(responseToSend);
-        throw new Error(`Proxied response is not a string, but ${typeof responseToSend}`);
+      
+      // Remove incorrect type check that expects responseToSend to be a string
+      // Instead, ensure it's a Buffer for consistent handling
+      if (!Buffer.isBuffer(responseToSend)) {
+        responseToSend = Buffer.from(responseToSend.toString());
       }
 
       if (optionsArg && optionsArg.responseModifier) {
@@ -74,4 +75,4 @@ export class HandlerProxy extends Handler {
       res.end();
     });
   }
-}
+}