(fix) proxy config with bypass and without target (#721)

Author: radotzki

lib/Server.js

@@ -219,6 +219,8 @@ function Server(compiler, options) {
 							next();
 						} else if(proxyMiddleware) {
 							return proxyMiddleware(req, res, next);
+						} else {
+							next();
 						}
 					});
 				});