add cmd/open_im_msg_gateway

cmd/open_im_msg_gateway/main.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"Open_IM/internal/msg_gateway/gate"
+	"flag"
+	"sync"
+)
+
+func main() {
+	rpcPort := flag.Int("rpc_port", 10500, "rpc listening port")
+	wsPort := flag.Int("ws_port", 10800, "ws listening port")
+	flag.Parse()
+	var wg sync.WaitGroup
+	wg.Add(1)
+	gate.Init(*rpcPort, *wsPort)
+	gate.Run()
+	wg.Wait()
+}