更新注释

README.md

@@ -2,14 +2,20 @@
 
 #### 创建docker容器
 ```shell
-   docker build -t pytools:latest .
+docker build -t pytools:latest .
 ```
 
 #### 创建容器并启动
-    >>> docker-compose up -d
+```shell
+docker-compose up -d
+```
 
 #### 销毁容器并关闭
-    >>> docker-compose down
+```shell
+docker-compose down
+```
 
 #### 重启全部容器服务
-    >>> docker-compose restart
+```shell
+docker-compose restart
+```