# Backend deploy — admin handoff + cutover plan

This doc captures everything needed to deploy the new CommunityRule
(Next.js + Postgres) onto MEDLab's Cloudron and replace the legacy
LAMP-packaged service at `communityrule.info`. Cloudron admin access
has been granted; remaining open item is the registry decision in §6.

> **For a plain-language summary to hand to MEDLab's Cloudron admin,
> see [`../relaunch-brief.md`](../relaunch-brief.md).** This doc is the
> technical version.

## 1. Context

- This app **fully replaces** the existing `communityrule.info`
  service — both the marketing site and the backend API.
- The existing service is a single Cloudron **LAMP** app
  (`lamp.cloudronapp.php74@5.1.2`, installed at the
  `communityrule.info` apex, 512 MiB) that hosts three things stuffed
  into one container under `/app/data/public/`:
  1. The static **marketing site** (HTML / CSS / images).
  2. The **Express/MySQL backend** at
     [`CommunityRule/CommunityRuleBackend`](https://git.medlab.host/CommunityRule/CommunityRuleBackend),
     kept alive by a 30-min `lsof`-based `run.sh` watchdog on port
     3000. MySQL is the LAMP package's bundled MySQL, persisted
     inside `/app/data` (not a Cloudron addon).
  3. A **Flask chatbot** at
     [`CommunityRule/CommunityRuleChatBot`](https://git.medlab.host/CommunityRule/CommunityRuleChatBot)
     on port 5000, also watchdog-supervised; currently crash-looping
     with `ModuleNotFoundError: No module named 'flask'` and last
     touched in May 2024. **Not migrated.** Dies with the LAMP
     container at decommission.
- The new app is a **properly packaged Cloudron app** (Docker image +
  `CloudronManifest.json`, postgresql + sendmail + localstorage
  addons). Cloudron's container supervisor replaces the watchdog.
- **Greenfield Postgres.** No data migration from the LAMP container's
  internal MySQL. Old auth (4-digit OTP in `email_otp`) is replaced
  by hashed magic-link tokens. Old API and `rules` /
  `version_history` tables do not map to anything in the new app.

## 2. Access — granted

Cloudron admin login on `cloud.medlab.host` granted. From the
dashboard the deployer can self-serve:

- [x] **Cloudron admin login** (full admin on the MEDLab instance).
- [x] **DNS for `communityrule.info`** — domain is managed inside
      Cloudron, so new subdomains and TLS certs are one-click.
- [x] **App log access** — Cloudron web log viewer.
- [x] **Read of legacy app config** — visible in admin UI.
- [ ] **`cloudron` CLI token** — generate at *Profile → API Tokens*
      before first install. Save in 1Password.

## 3. Environment variables

### Cloudron auto-injects (provisioned by addons declared in `CloudronManifest.json`)

Cloudron addons are not "enabled" platform-wide; they are requested
per-app in the manifest and provisioned at install time.

- `CLOUDRON_POSTGRESQL_URL` — from the **postgresql** addon. The app
  reads this name directly (Prisma + [`lib/server/env.ts`](../../lib/server/env.ts)).
- `CLOUDRON_MAIL_SMTP_SERVER` / `_PORT` / `_USERNAME` / `_PASSWORD` —
  from the **sendmail** addon. The platform Mail server is configured
  for `communityrule.info` with **Amazon SES relay** + "allow custom
  from address" on, so `SMTP_FROM` of our choice will deliver. The app
  assembles a Nodemailer transport URL from these four vars in
  [`lib/server/env.ts`](../../lib/server/env.ts).

### I set manually via `cloudron configure --app <id> --set-env`

- `SESSION_SECRET` — long random (`openssl rand -hex 32`). Required,
  ≥ 16 chars. Rotating it logs everyone out.
- `SMTP_FROM` — visible "From:" address on sign-in emails. Cloudron
  does not inject this. Use `hello@communityrule.info` (continuity
  with the legacy service; SES relay accepts it).
- `NEXT_PUBLIC_ENABLE_BACKEND_SYNC=true` — turns on Postgres draft
  persistence for signed-in users. Required in production.
- `UPLOAD_ROOT` — absolute path to a writable directory (typically on the
  Cloudron **localstorage** mount) for `POST /api/uploads` (community photo +
  custom-method attachments). When unset, upload routes return
  `server_misconfigured`. See [CONTRIBUTING.md](../../CONTRIBUTING.md) API table.

## 4. Platform settings

- Container `httpPort`: **3000** (matches [`Dockerfile`](../../Dockerfile)
  `ENV PORT=3000`).
- Health-check path: **`/api/health`**
  ([`app/api/health/route.ts`](../../app/api/health/route.ts) returns
  `200 {"ok":true,"database":"connected"}` when healthy, `503`
  otherwise).
- Memory limit: start at **512 MiB** (matches what the legacy LAMP
  app has been running fine on for two years); raise if Next.js
  standalone OOMs under load.
- Backups: Cloudron's automatic backups are already on for the host
  (legacy app shows weekly snapshots ~451 MB each). Same default
  applies to new apps.
- TLS / DNS / SPF / DKIM: handled by Cloudron for any subdomain of
  `communityrule.info`.

## 5. Cutover plan (side-by-side, never in-place)

The legacy app is at the apex `communityrule.info` and is still
serving real traffic. Best practice is **side-by-side cutover** — new
app gets validated at a fresh subdomain before any swap touches the
apex.

### Phases

1. **Staging install** — `cloudron install --image <our-image>
   --location staging.communityrule.info`. Set env vars from §3. Run
   `prisma migrate deploy`. Smoke per
   [CR-98](https://linear.app/community-rule/issue/CR-98/backend-cloudron-staging-install-smoke).
2. **Soft launch / acceptance** — share the staging URL with a small
   group, exercise sign-in + publish + draft sync end-to-end. Hold
   here until confident.
3. **Apex cutover at a scheduled low-traffic window** — this is the
   only step with brief downtime (~5–15 min). Sequence:
   1. Take one final manual backup of the legacy LAMP app (Cloudron
      *Backups* tab → *Backup now*).
   2. `cloudron uninstall` the legacy app at `communityrule.info`.
   3. `cloudron configure --location communityrule.info` to move the
      validated staging install to the apex (or `cloudron install`
      fresh at apex if cleaner).
   4. Re-run `prisma migrate deploy`, re-set production env vars if
      not preserved by the move, smoke again.
4. **Decommission** — see [CR-101](https://linear.app/community-rule/issue/CR-101/backend-decommission-legacy-expressmysql-backend).
   Hold the final LAMP backup ≥ 90 days for safety.

### Why not in-place?

Uninstalling the legacy app and installing the new one at apex
without a staging step means the live site is down for the entire
duration of the first install — and the first install is exactly when
all the env-var / addon / port surprises happen. Side-by-side keeps
those surprises out of view.

## 6. Decisions — status

Product decisions (closed):

1. **Final URL — `communityrule.info` apex.** New app fully replaces
   the legacy site, including the marketing surface. Brief cutover
   downtime (~5–15 min) is accepted.
2. **Legacy `rules` data — not migrated.** No data moves into the new
   app's Postgres. A pre-cutover **read-only export** of the
   `rules` + `version_history` MySQL tables is under consideration;
   approach depends on the actual row count, which we'll pull as
   part of the CR-99 pre-cutover backup. Tracked in
   [CR-102](https://linear.app/community-rule/issue/CR-102/backend-decide-fate-of-legacy-rules-table-read-only-export).

Infra decision still open:

3. **Container registry** — GHCR (under your personal / org account,
   lowest friction), Docker Hub, or MEDLab self-hosted. Tracked in
   [CR-97](https://linear.app/community-rule/issue/CR-97/backend-container-image-registry-choose-build-push).

## 7. Old vs new deltas

So nothing surprises anyone at cutover:

- Legacy is a **LAMP package** with bundled MySQL inside the
  container. New app uses the Cloudron **postgresql + sendmail +
  localstorage** addons — entirely different storage, no shared
  state.
- Legacy stuffs three apps (marketing + Node backend + Python
  chatbot) into one container with a `run.sh` watchdog. New app is
  one Next.js process, supervised by Cloudron natively.
- Old auth = plaintext 4-digit OTP. New auth = hashed magic **link**
  in email. If users report "I'm not getting a code," remind them to
  look for a link instead.
- Old code hardcoded `from: 'hello@communityrule.info'` in
  [`controllers/emailController.js`](https://git.medlab.host/CommunityRule/CommunityRuleBackend/raw/branch/master/controllers/emailController.js)
  because Cloudron does not inject a `MAIL_FROM`. New app reads
  `SMTP_FROM` — see §3.
- Old API surface (`/api/send_otp`, `/api/publish_rule`, etc.) and
  schema (`rules` + `version_history` tables, soft-delete via
  `deleted` column) **do not overlap** with the new app. No data
  migration.
- The Flask chatbot at
  [`CommunityRule/CommunityRuleChatBot`](https://git.medlab.host/CommunityRule/CommunityRuleChatBot)
  is currently crash-looping inside the LAMP container and is **not
  being migrated** — confirmed with admin. It dies when the LAMP
  container is uninstalled in [CR-101](https://linear.app/community-rule/issue/CR-101/backend-decommission-legacy-expressmysql-backend).

## 8. Follow-up tickets

All filed in Linear, titled `[Backend] …`, assigned to me, in the
**Community-rule** team, **Backlog** state.

1. [**CR-96**](https://linear.app/community-rule/issue/CR-96/backend-bridge-cloudron-env-vars-to-canonical-names)
   — `[Backend] Cloudron-native env vars` (shipped: app reads
   `CLOUDRON_POSTGRESQL_URL` and `CLOUDRON_MAIL_SMTP_*` only).
2. [**CR-97**](https://linear.app/community-rule/issue/CR-97/backend-container-image-registry-choose-build-push)
   — `[Backend] Container image registry: choose, build, push`.
   Blocked by registry decision (§6.3).
3. [**CR-98**](https://linear.app/community-rule/issue/CR-98/backend-cloudron-staging-install-smoke)
   — `[Backend] Cloudron staging install + smoke` at
   `staging.communityrule.info`. Blocked by CR-96 + CR-97.
4. [**CR-99**](https://linear.app/community-rule/issue/CR-99/backend-cloudron-production-install-apex-cutover)
   — `[Backend] Cloudron production install + apex cutover`.
   Side-by-side cutover at scheduled low-traffic window per §5.
   Blocked by CR-98 green + CR-102 resolved.
5. [**CR-100**](https://linear.app/community-rule/issue/CR-100/backend-steady-state-operator-runbook)
   — `[Backend] Steady-state operator runbook`. Blocked by CR-98
   (write what we actually did).
6. [**CR-101**](https://linear.app/community-rule/issue/CR-101/backend-decommission-legacy-communityrule-lamp-app)
   — `[Backend] Decommission legacy CommunityRule LAMP app`.
   Uninstall the entire LAMP slot (marketing + Express backend +
   chatbot in one go); preserve final backup ≥ 90 days. Blocked by
   CR-99 + sign-off window. Priority: Low.
7. [**CR-102**](https://linear.app/community-rule/issue/CR-102/backend-decide-fate-of-legacy-rules-table-read-only-export)
   — `[Backend] Decide fate of legacy rules table (read-only export?)`.
   Count rows + decide whether to publish a static archive before
   CR-99 uninstalls the legacy MySQL. Priority: Low.

## 10. Rate limiting (single-instance deploys)

The app uses an **in-memory** rate limiter in [`lib/server/rateLimit.ts`](../../lib/server/rateLimit.ts) (magic-link requests, organizer inquiry, etc.). This is sufficient for the current **single Cloudron container** per environment.

**Before horizontal scale-out** (multiple app instances behind a load balancer), replace or back the limiter with a shared store (e.g. Redis) so per-IP / per-user windows apply across instances. Until then, document expected limits in the steady-state runbook ([CR-100](https://linear.app/community-rule/issue/CR-100/backend-steady-state-operator-runbook)).

## 11. Related docs

- [`docs/guides/backend-roadmap.md`](backend-roadmap.md) §11
  (environments) and §8 (Prisma migrations policy).
- [`docs/guides/backend-linear-tickets.md`](backend-linear-tickets.md)
  Ticket 12 / CR-83 — this doc satisfies it.
- [`CONTRIBUTING.md`](../../CONTRIBUTING.md) — local dev setup
  (Postgres, magic-link, draft sync).