GraphQL schema does not update on change in sources when running in Docker

[tokarenko]

When running Strawberry in a Docker container, GraphQL schema is frozen to the original state when the contatier is built. When the source code is changed neither hot reload, nor container reload works to refresh the schema. Only container rebuild refreshes the schema. I tried replacing sources with docker copy, mounting folder with the source code to the container, removing pycache folders, upgrading OS, Docker... I would be grateful if someone could come up with suggestions on how to solve the issue.

Versions:
strawberry-graphql 0.253.1
uvicorn 0.30.6
fastapi 0.112.2
Docker 20.10.17, build 100c701
OS Ubuntu 20.04.6 LTS

Dockerfile

...
CMD ["uvicorn", "app_model:app", "--reload", "--host", "0.0.0.0", "--port", "8022"]

app.py

from backend_model.api.graphql.app_graphql import graphql_app
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI()
origins = ["*"]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(graphql_app, prefix="/graphql")

graphql_app.py

import strawberry
from strawberry.fastapi import GraphQLRouter
from strawberry.schema.config import StrawberryConfig

from .info import CustomInfo
from .scalars import scalar_overrides
from .schema.query import Query

schema = strawberry.Schema(
    query=Query,
    scalar_overrides=scalar_overrides,
    config=StrawberryConfig(info_class=CustomInfo),
)

graphql_app = GraphQLRouter(schema)