[WIP] - Deployment documentation

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The deployment documentation doesn't give info on commands to run.

As a newly-onboarded developer
I want clear instructions
So that I can deploy the delta backend

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Missing items by section

Prerequesites

Cloud deployment

• Are there any dependencies?
• How to set up dependencies?
• Access permissions
• System level env vars for CLI use
• Other AWS/CDK tools required but not defined in requirements.txt?

Local deployment

• Are there any dependencies?
• How to set up dependencies?

Deployment

To The cloud ✈️

• How to define what environment to deploy to
• Where to get the various env var values
• A list of gotchas to beware of
• What command to run to kick off a deployment

Locally

• Do we use docker?
• How does one deploy locally
• Why would one deploy locally
• Gotchas
• Prerequsites