Update Docker-Install.md

Docker-Install.md

@@ -1,10 +1,10 @@
 ## Installation
 ```
-docker pull opennamu/opennamu
+docker pull opennamu/stable
 ```
 
 ## Start
 ```
-docker run -p 3000:3000 -v data:/app/data --name opennamu opennamu/opennamu
-docker run -p <host-port>:3000 -v <host-data_directory>:/app/data --name <docker-containername> opennamu/opennamu
+docker run -p 3000:3000 -v data:/app/data --name opennamu opennamu/stable
+docker run -p <host-port>:3000 -v <host-data_directory>:/app/data --name <docker-containername> opennamu/stable
 ```