docs: add root README with project overview and Docker run guide

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -0,0 +1,97 @@
+# temetro
+
+**temetro** is an **open-source** clinical tool that acts as an **AI middleman** between clinicians
+and patient data. Clinicians use a natural-language AI chat to retrieve and organize patient
+information, displayed as rich record cards.
+
+Its distinguishing idea is a **patient-owned data model**: instead of (or alongside) living in a
+doctor's own database, a patient's record can be stored on the **patient's own device**. When a
+clinician adds or changes data, they **sign** it (blockchain-style); the change is written to the
+patient's record and **cannot be modified until the patient approves it** through a companion app.
+temetro can also **read existing patient databases** and present them in the same organized card UI.
+
+> **Status.** The **backend is built** — a TypeScript + Express + Postgres API (Drizzle ORM) with
+> authentication and multi-tenant clinics via [Better Auth](https://better-auth.com), an org-scoped
+> patient records API, plus appointments, prescriptions, tasks, doctor's notes, analytics, an
+> activity audit log, real-time staff messaging (Socket.io), and notifications. The **frontend chat
+> is wired to it** (real auth, route protection, clinic switching, live patient data).
+>
+> **Still vision, not built:** the patient companion app and the blockchain-style
+> **signing / patient-owned storage / approval** flow, and the AI chat replies themselves (currently
+> mock — no LLM call yet; a `/chat` endpoint is the next planned step).
+
+## Monorepo layout
+
+This repository is a **monorepo** containing two independent apps that live side by side (each with
+its own `package.json` / `node_modules` and its own `CLAUDE.md`):
+
+- **[`frontend/`](./frontend)** — the Next.js 16 product app (the clinician-facing AI chat UI).
+  See [`frontend/CLAUDE.md`](./frontend/CLAUDE.md).
+- **[`backend/`](./backend)** — the Express 5 + Postgres API (Drizzle ORM + Better Auth).
+  See [`backend/CLAUDE.md`](./backend/CLAUDE.md) and [`backend/README.md`](./backend/README.md).
+
+The marketing **landing page lives in its own separate repository** (`temetro-landing`), not here.
+
+## Run locally with Docker (recommended)
+
+Docker Compose builds and runs Postgres, the backend, and the frontend together. From the
+**`backend/`** directory (the Compose file builds the sibling `../frontend`):
+
+```bash
+cd backend
+cp .env.example .env
+
+# generate a strong auth secret and paste it into BETTER_AUTH_SECRET in .env:
+openssl rand -base64 32
+
+docker compose up --build
+```
+
+Then open:
+
+- Frontend → http://localhost:3000
+- Backend → http://localhost:4000 (health check: `GET /health`)
+- Postgres → localhost:5432
+
+Database migrations are applied automatically on backend container start.
+
+**Port conflict?** If another Postgres already holds host port `5432`, set `POSTGRES_PORT` (e.g.
+`5433`) in `backend/.env`. The app still talks to Postgres internally on `db:5432`; only the
+published host port changes.
+
+Run just the API + database with `docker compose up db backend`. To browse the database with
+Adminer: `docker compose --profile tools up adminer` → http://localhost:8080.
+
+## Run locally without Docker
+
+Run each app in its own terminal (you'll need a local Postgres reachable from `DATABASE_URL`):
+
+```bash
+# backend
+cd backend
+npm install
+cp .env.example .env        # point DATABASE_URL at your local Postgres
+npm run db:migrate          # apply migrations
+npm run dev                 # http://localhost:4000
+
+# frontend (second terminal)
+cd frontend
+npm install
+npm run dev                 # http://localhost:3000
+```
+
+The frontend reads `NEXT_PUBLIC_API_URL` (default `http://localhost:4000`) to reach the backend.
+
+> If `SMTP_HOST` is unset, verification / reset / invitation emails are **printed to the backend
+> console** instead of being sent — no email setup is needed for local development.
+
+## Tech stack
+
+- **Frontend:** Next.js 16 (App Router) · React 19 · TypeScript · Tailwind CSS v4 · i18next ·
+  Socket.io client.
+- **Backend:** Node ≥ 20 · TypeScript (ESM) · Express 5 · Postgres · Drizzle ORM · Better Auth
+  (email/password + organizations/RBAC) · Socket.io.
+
+## License
+
+MIT.