🐳 bump to ghost 5 + mysql

docker-compose.yml

@@ -1,11 +1,24 @@
 version: "3"
 services:
   ghost:
-    image: ghost:4-alpine
+    image: ghost:5-alpine
     ports:
       - 2368:2368
+    environment:
+      # see https://ghost.org/docs/config/#configuration-options
+      database__client: mysql
+      database__connection__host: db
+      database__connection__user: root
+      database__connection__password: password
+      database__connection__database: ghost
+      url: http://localhost:2368
     restart: unless-stopped
     volumes:
       - ghost:/var/lib/ghost/content
+  db:
+    image: mysql:8.0
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: password
 volumes:
   ghost: