Update Ghost to 5.2.4

compose.yml

@@ -2,7 +2,7 @@ version: "3.8"
 
 services:
   app:
-    image: ghost:4-alpine
+    image: ghost:5-alpine
     environment:
       # see https://ghost.org/docs/config/#configuration-options
       database__client: mysql
@@ -40,6 +40,7 @@ services:
         - "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
         - "backupbot.backup=true"
         - "backupbot.backup.path=/var/lib/ghost/content"
+        - "coop-cloud.${STACK_NAME}.version=0.1.0+5.2.4"
     # healthcheck:
     #   test: ["CMD", "curl", "-f", "http://localhost"]
     #   interval: 30s