It'd be great to have an environment variable GHOST_API_KEY that enables access to remote Ghost content from the domain:
version: "3.1"
services:
ghost:
image: ghost:alpine
ports:
- "3001:2368"
volumes:
# Mount only the specific directories you need
- ./ghost-content:/var/lib/ghost/content
environment:
NODE_ENV: development
database__connection__filename: /var/lib/ghost/content/data/ghost.db
url: https://website.ghost.io
GHOST_API_KEY: ?