Initial commit

**Motivations:**
- Initialisation du versionning git pour le projet

**Root causes:**
- N/A (Nouveau projet)

**Correctifs:**
- N/A

**Evolutions:**
- Structure initiale du projet
- Ajout du .gitignore

**Pages affectées:**
- Tous les fichiers

server/README.md

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+# Build a Zoo — API server
+
+Node + Express + PostgreSQL. Auth by Ed25519 keypair (pseudo, no password). Zoos and game state persisted in DB; bots ensure minimum zoo density on the map.
+
+## Prerequisites
+
+- Node 18+
+- PostgreSQL (create a database, e.g. `builazoo`)
+
+## Setup
+
+```bash
+npm install
+createdb builazoo   # or your DB name
+psql -d builazoo -f schema.sql
+```
+
+Set environment:
+
+- `DATABASE_URL`: connection string (default `postgres://localhost/builazoo`)
+- `PORT`: HTTP port (default `3000`)
+
+## Run
+
+```bash
+npm start
+```
+
+API base URL is `http://localhost:3000` (or your host/port). From the web client, set `window.BUILAZOO_API_URL` to this URL before loading the app (e.g. in HTML or via build env) to enable sign-up and sync. For local testing you can also open the web app with `?api=http://localhost:3000` (or your API origin).
+
+## Endpoints
+
+- `GET /api/health` — health check
+- `POST /api/auth/register` — create account (body: `{ pseudo }`, header: `X-Public-Key` base64url)
+- `GET /api/zoos` — list zoos for map (creates bots if below `minZoos`)
+- `GET /api/zoos/me` — get my zoo + game_state (signed)
+- `POST /api/zoos/me` — create my zoo (signed, body: `{ name?, game_state }`)
+- `PATCH /api/zoos/me` — update game_state (signed, body: `{ game_state }`)
+
+Signed requests use headers: `X-Public-Key`, `X-Signature`, `X-Timestamp`. Message signed = `method + path + timestamp + SHA256(body)`.