Your best bet is using the Ghost RSS feed (you can use a feed for a specific Ghost tag).
You can either use something like https://www.mastofeed.org/
Or set it up using webhooks, here is a guide for an IFTTT setup:
Your best bet is using the Ghost RSS feed (you can use a feed for a specific Ghost tag).
You can either use something like https://www.mastofeed.org/
Or set it up using webhooks, here is a guide for an IFTTT setup: