Ft/deployment setup

[thepsalmist]

This PR creates a workflow to deploy the news-search-api separately from the story-indexer.
Define workflow to deploy to staging & production

[thepsalmist]

PS: We setting the SENTRY_DSN in the private story_indexer repo?

[philbudne]

Sure on the ESHOSTS, but the `ui` still references the `api` using the container name `APIURL: http://api:8000/v1`, so I guess retaining a custom defined network rather than using the default docker bridge network provides for better isolation

Containers in the same stack can always reach each other. As long as the servers where development, staging and production stacks are run are not in the same swarm cluster, the network name can be static, but requiring an external network doesn't seem necessary to me.

[philbudne]

Approved. While I have remaining issues/questions (which could take an hour to fully write up), it's already taken too long to get to this point, and past experience has shown that in a week it's unlikely to be more than 50% better than the week before.

[thepsalmist]

@kilemensi you can have a final review

[kilemensi]

🚀