feat: Docker deployment + Gitea CI/CD workflow

- Multi-stage Dockerfile: Node frontend build → Python wheel build → slim runtime
- Backend serves SvelteKit static output via FastAPI StaticFiles mount
- docker-compose.yml with named volume for /data persistence
- Gitea Actions workflow: build/push Docker image + create release on v* tags
- Add NOTIFY_BRIDGE_STATIC_DIR config for frontend path
- Fix run() to use configurable host/port

docker-compose.yml

@@ -0,0 +1,23 @@
+services:
+  notify-bridge:
+    image: git.dolgolyov-family.by/alexei.dolgolyov/notify-bridge:latest
+    # For local builds instead of pulling from registry:
+    # build: .
+    container_name: notify-bridge
+    restart: unless-stopped
+    ports:
+      - "8420:8420"
+    volumes:
+      - notify-bridge-data:/data
+    environment:
+      - NOTIFY_BRIDGE_SECRET_KEY=${NOTIFY_BRIDGE_SECRET_KEY:?Set NOTIFY_BRIDGE_SECRET_KEY (min 32 chars)}
+      - NOTIFY_BRIDGE_CORS_ALLOWED_ORIGINS=${NOTIFY_BRIDGE_CORS_ALLOWED_ORIGINS:-*}
+    healthcheck:
+      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8420/api/health')"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
+
+volumes:
+  notify-bridge-data: