feat(api): add backend

routes and WebSockets

services/api/app/db/base.py

@@ -0,0 +1,5 @@
+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase):
+    pass

services/api/app/db/session.py

@@ -0,0 +1,12 @@
+from typing import AsyncGenerator
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.core.config import settings
+
+engine = create_async_engine(settings.DATABASE_URL, echo=False, pool_pre_ping=True)
+SessionLocal = async_sessionmaker(engine, expire_on_commit=False, autoflush=False)
+
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with SessionLocal() as session:
+        yield session