diff --git a/etcd-docker/etcd.yaml b/etcd-docker/etcd.yaml
new file mode 100644
index 0000000..7590c8b
--- /dev/null
+++ b/etcd-docker/etcd.yaml
@@ -0,0 +1,34 @@
+version: '3'
+networks:
+  ? byfn
+
+services:
+  etcd1:
+    image: quay.io/coreos/etcd
+    container_name: etcd1
+    command: etcd -name etcd1 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
+    ports:
+      - 2379
+      - 2380
+    networks:
+      - byfn
+
+  etcd2:
+    image: quay.io/coreos/etcd
+    container_name: etcd2
+    command: etcd -name etcd2 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
+    ports:
+      - 2379
+      - 2380
+    networks:
+      - byfn
+
+  etcd3:
+    image: quay.io/coreos/etcd
+    container_name: etcd3
+    command: etcd -name etcd3 -advertise-client-urls http://0.0.0.0:2379 -listen-client-urls http://0.0.0.0:2379 -listen-peer-urls http://0.0.0.0:2380 -initial-cluster-token etcd-cluster -initial-cluster "etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380" -initial-cluster-state new
+    ports:
+      - 2379
+      - 2380
+    networks:
+      - byfn
diff --git a/examples/hello-midway/src/app.ts b/examples/hello-midway/src/app.ts
index ebc7ad9..6f1736a 100644
--- a/examples/hello-midway/src/app.ts
+++ b/examples/hello-midway/src/app.ts
@@ -21,7 +21,7 @@
 export default async (app: Application) => {
   console.log('🚀 Your awesome APP is launching...');
   await dubbo(app);
-  await app.dubbo.ready();
   console.log('dubbo was ready..');
+  await app.dubbo.ready();
   console.log('✅  Your awesome APP launched');
 };
diff --git a/examples/hello-midway/src/config/config.default.ts b/examples/hello-midway/src/config/config.default.ts
index 90dfc8d..9114511 100644
--- a/examples/hello-midway/src/config/config.default.ts
+++ b/examples/hello-midway/src/config/config.default.ts
@@ -28,6 +28,17 @@
   // add your config here
   config.middleware = [];
 
+  /**
+   * dubbo config
+   *
+   * application 当前的应用标识
+   * register 注册中心地址
+   *   support registry mode
+   *     1、 zookeeper  'localhost:2181,localhost:2182,localhost:2183'
+   *     2、 nacos      'nacos://localhost:2181'
+   *       nacos 注册地址要以 nacos:// 开头
+   *
+   */
   config.dubbo = {
     application: 'hello-midway',
     // zookeeper 的链接
diff --git a/start_etcd.sh b/start_etcd.sh
new file mode 100755
index 0000000..bc9f7da
--- /dev/null
+++ b/start_etcd.sh
@@ -0,0 +1,2 @@
+cd etcd-docker
+docker-compose -f etcd.yaml up