Run update.sh

ghost/README.md

@@ -136,7 +136,7 @@ version: '3.1'
 services:
 
   ghost:
-    image: ghost:3-alpine
+    image: ghost:4-alpine
     restart: always
     ports:
       - 8080:2368
@@ -159,7 +159,7 @@ services:
       MYSQL_ROOT_PASSWORD: example
 ```
 
-[![Try in PWD](https://github.com/play-with-docker/stacks/raw/cff22438cb4195ace27f9b15784bbb497047afa7/assets/images/button.png)](http://play-with-docker.com?stack=https://raw.githubusercontent.com/docker-library/docs/ff4ab86fc4ec774fb4d419480fd412064b38054f/ghost/stack.yml)
+[![Try in PWD](https://github.com/play-with-docker/stacks/raw/cff22438cb4195ace27f9b15784bbb497047afa7/assets/images/button.png)](http://play-with-docker.com?stack=https://raw.githubusercontent.com/docker-library/docs/cd439efd00ac238cdd9dcbb58c2e91e7d46a1ffa/ghost/stack.yml)
 
 Run `docker stack deploy -c stack.yml ghost` (or `docker-compose -f stack.yml up`), wait for it to initialize completely, and visit `http://swarm-ip:8080`, `http://localhost:8080`, or `http://host-ip:8080` (as appropriate).