We need a guide on "Deploying Horizon"

[dalanmiller]

Right now we have a list of Horizon basics and Building Horizon apps I'm not sure if either of these is a good spot or maybe it should go under Resources.

This guide should start with the assumption that:

• You have built your Horizon app
• You have your database in a ready state with collections and indexes created
  • Either thanks to --auto-create-collection --auto-create-index and/or use of hand editing the schema.toml file

The guide should then cover:

• Exporting your current database collections/indexes meta-state into schema.toml
• Securely moving schema.toml and secrets.toml file to your deployment server.
  • Or maybe putting schema.toml into source control but explain why secrets.toml should definitely not be? (Unless it's a private repo?)
• How to start hz serve and import the new schema.toml settings
  • Including recommended configuration for hz serve in production