Большие изменения с добавленем Alembic

backend-app/main.py

@@ -4,21 +4,32 @@ from fastapi.responses import ORJSONResponse
 from core.settings import settings
 from api.main_router import router as main_router
 from api.another_router import router as another_router
+from core.models import db_helper
+from contextlib import asynccontextmanager
 
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    #start up
+    yield
+    #shutdown
+    await db_helper.dispose()
 
-app = FastAPI(default_response_class=ORJSONResponse)
+main_app = FastAPI(
+    lifespan=lifespan,
+    default_response_class=ORJSONResponse
+    )
 
 
 #api/hello
-app.include_router(
+main_app.include_router(
     router=main_router,
     prefix="/api",
     tags=["Основной роутер"]
     )
-app.include_router(
+main_app.include_router(
     router=another_router,
     prefix="/another",
     tags=["Побочный роутер"]
     )
 if  __name__ == "__main__":
-    uvicorn.run(app, host=settings.run.host, port=settings.run.port)
+    uvicorn.run(main_app, host=settings.run.host, port=settings.run.port)