chore(server) combine: add comment

lib/server.js

@@ -248,6 +248,10 @@
                     }
                 });
                 
+                /* 
+                 * pipe should be setted up after
+                 * readPipe called with stream param
+                 */
                 if (isGzip)
                     gzip.pipe(p.response);
             };