update readme

README.md

@@ -109,9 +109,19 @@ msghandler enables seamless communication across multiple platforms through NATS
 ```julia
 using msghandler, NATS
 
-data = [("test_message", "Hello World", "text")]  # payloads to be send format is [(dataname, data, type), ...] tuples.
-envelope, envelope_json_str = smartpack("test.topic", data; broker_url="nats.yiem.cc")
-conn = NATS.connect(broker_url)  # Create NATS connection
+payload_1 = ("test_message", "Hello World", "text")
+
+file_path_large_image = "./test/large_image.png"
+file_data_large_image = read(file_path_large_image)
+filename_large_image = basename(file_path_large_image)
+payload_2 = (filename_large_image, file_data_large_image, "binary")
+
+payloads = [payload_1, payload_2]  # payloads to be send format is [(dataname, data, type), ...] tuples.
+envelope, envelope_json_str = msghandler.smartpack("test.topic", 
+                                                  payloads; 
+                                                  broker_url="nats.yiem.cc",
+                                                  fileserver_url="http://192.168.88.104:8080")
+conn = NATS.connect("nats.yiem.cc")  # Create NATS connection
 NATS.publish(conn, "test.topic", envelope_json_str)  # Publish message to NATS
 NATS.drain(conn)
 ```