Fix expose syntax in ghost container (#88)

* Fix expose syntax in ghost container

* Remove expose property completely

Author: betschki

compose.yml

@@ -24,8 +24,6 @@ services:
     # Do not alter this without updating the Tinybird Sync container as well
     image: ghost:${GHOST_VERSION:-6-alpine}
     restart: always
-    expose:
-      - "127.0.0.1:${GHOST_PORT:-2368}:2368"
     # This is required to import current config when migrating
     env_file:
       - .env