Modifiable persistent deployment configuration

[michaelfig]

This change is just to write out the ag-setup-cosmos init configuration to deployment.json. Also allow rerunning init to modify the deployment.json.

Bonus change: upgrade the DigitalOcean default node size to 4GB RAM, which is necessary to meet system requirements.

[dckc]

I'm struggling to figure out which end is up... init.js seems to export doInit... which is imported from main.js... which exports main but... then the trail goes cold. I checked README.md and package.json and Makefile but I don't see how init.js gets invoked.

Also... the exported doInit closes over powerful globals, which makes me reluctant to give this an "I'm happy to maintain it" approval. ref #2160

[michaelfig]

I'm struggling to figure out which end is up... init.js seems to export doInit... which is imported from main.js... which exports main but... then the trail goes cold. I checked README.md and package.json and Makefile but I don't see how init.js gets invoked.

The entrypoint is deployment/ag-setup-cosmos .

Also... the exported doInit closes over powerful globals, which makes me reluctant to give this an "I'm happy to maintain it" approval. ref #2160

Yeah, duly noted. This package is messy mostly because it's a glorified sysadmin script. I'm saving a major refactoring until we make a concerted effort towards ocap discipline, but there are bigger fish to fry in the more user-facing packages.

[dckc]

I'm approving based on understand the motivation for this change.

If you a review of the implementation details is important, you should probably dismiss this review and either (a) stand by until I find time to study it further (could be a while), (b) give me a call, or (c) get another reviewer involved.