update docs, add infra notes

docs/infrastructure.md

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+# Roleypoly Infrastructure
+
+## Ring 0
+
+Any of these missing is a service outage.
+
+### Backend
+
+Backend is a Cloudflare Worker deployment. Edge computing, fuck yeah!
+
+Hosts:
+
+- `api.${env}.roleypoly.com/*`
+  - ex. for stage: `api.stage.roleypoly.com/*`
+- `api.roleypoly.com/*` (only in prod)
+
+It uses 3 KV namespaces per environment:
+
+- Sessions
+
+  - Store of data and tokens mapped to sessions
+  - All data subject to 6 hour TTL
+
+- GuildData
+
+  - Store of guild data, e.g. categories, etc
+  - All data is permanent (maybe doubly persisted to Firestore)
+
+- Guilds
+  - Cache of Discord guild data
+  - All data subject to a 5 minute TTL
+
+### App UI
+
+The Next.js server is a docker container hosted on Google Cloud Run in multiple regions with a load balancer. Region focuses knowing traffic: US (x3), EU (x2), AP (x3). There is a running maximum of 10 containers per region, and a minimum of 0.
+
+Regions:
+
+- `us-east4` (South Carolina)
+- `us-central1` (Iowa)
+- `us-west1` (Oregon)
+- `europe-west2` (London)
+- `europe-west3` (Frankfurt)
+- `australia-southeast1` (Sydney)
+- `asia-northeast1` (Tokyo)
+- `asia-southeast1` (Singapore)
+
+Staging is only deployed to `us-east4`.
+
+Hosts:
+
+- `web.${env}.roleypoly.com`
+  - ex. for stage: `web.stage.roleypoly.com`
+- `roleypoly.com` (only in prod, after release)
+- `next.roleypoly.com` (only in prod, pre-release)
+- `beta.roleypoly.com` (only in stage)
+
+## Ring 1
+
+Ephemeral services that can be tolerably lost, and would not be considered an outage, only degraded.
+
+### v1 Migration Service
+
+Hosted on v1 infrastructure, e.g. DigitalOcean. It is a connector and JSON API to the old v1 PgSQL data.
+
+Host: `migration.v1.roleypoly.com` (Locked down to specific authorization tokens)
+
+Sunset: Roleypoly Next + 3 months
+
+### Bot (Mention Responder)
+
+Bot doesn't do much, it's on a modestly sized Compute Engine VM using container hosting. It has no access to anything related to the real deployment of Roleypoly :)
+
+Region: `us-east4` (South Carolina)
+
+## Ring 2
+
+Not end user applications. These will never be considered an "outage" if they are lost.
+
+### Design System Storybook
+
+Design system is a Vercel deployment
+
+Host:
+
+- `ui.roleypoly.com`