Update README to match current backend behavior

README.md

@@ -6,23 +6,27 @@ Dark dashboard for Arr* services and custom links.
 
 - First-run admin setup
 - Cookie-based admin auth
+- Health endpoint at `/healthz`
+- Readiness endpoint at `/readyz` (optional DB write probe)
 - Public dashboard with search/filter
 - Dedicated protected admin page at `/admin`
 - Link CRUD backed by MariaDB
 - Icon blobs stored in the database
-- Single-container deployment
+- Containerized app deployment (requires MariaDB)
 - Admin-managed service links
 
 ## Local Dev
 
 ```bash
 npm install
+pip install -r backend/requirements.txt
 npm run dev
 ```
 
 Backend runs on `http://localhost:6363`.
 
 Open `/admin` for the protected management page.
+Ensure MariaDB is running and reachable by the backend `DB_*` variables.
 
 ## Docker
 
@@ -32,6 +36,12 @@ docker compose up --build
 
 The app expects a MariaDB instance configured through environment variables.
 
+### Health Endpoints
+
+- `GET /healthz` returns `{"ok": true}` when the app process is up
+- `GET /readyz` returns `{"ok": true}` when database checks pass
+- `GET /readyz?write_test=true` additionally verifies DB writes using a temporary table
+
 ### Session and Cookie Env Vars
 
 - `SESSION_TTL_SECONDS` (default: `86400`)
@@ -41,6 +51,10 @@ The app expects a MariaDB instance configured through environment variables.
 - `LOGIN_MAX_ATTEMPTS` (default: `5`)
 - `LOGIN_WINDOW_SECONDS` (default: `300`)
 - `LOGIN_LOCKOUT_SECONDS` (default: `900`)
+- `MAX_NAME_LEN` (default: `255`)
+- `MAX_CATEGORY_LEN` (default: `255`)
+- `MAX_DESCRIPTION_LEN` (default: `2000`)
+- `MAX_ICON_URL_LEN` (default: `2048`)
 - `MAX_ICON_BYTES` (default: `2097152`)
 - `USERNAME_MAX_LEN` (default: `64`)
 - `PASSWORD_MIN_LEN` (default: `12`)