Add initial project structure with Docker, CI, and FastAPI setup

- Create Dockerfile and docker-compose.yml for containerization
- Add CI configuration for linting and testing
- Implement FastAPI application with health check routes
- Set up database schema using DuckDB
- Include environment configuration and secrets management
- Add README with project objectives and key features
- Implement logging setup and configuration
- Create initial tests for health route
- Add HTML templates for web interface

tests/test_health.py

@@ -0,0 +1,14 @@
+import httpx
+
+from arbitrade.api.app import create_app
+from arbitrade.config.settings import Settings
+
+
+async def test_health_route_returns_ok() -> None:
+    app = create_app(Settings())
+    transport = httpx.ASGITransport(app=app)
+    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+        response = await client.get("/health")
+
+    assert response.status_code == 200
+    assert response.json()["status"] == "ok"