current i have a fastapi app that i am developing and try to do testing under 2 machine. 1 with docker and another one without.

in this case without docker one, i wanted to launch uvicorn from the terminal as usual

uvicorn main:app --reload

is possible to run without issue, with my main.py having imports from another file like this

from util import search_card_price

with the same thing, i went for docker and try to build it, it will give me this error

web_1      |   File "./app/main.py", line 6, in <module>

web_1      |     from util import search_card_price

web_1      | ModuleNotFoundError: No module named 'util'

what is the best way for me to do my import that works on both places?

my current application is something like for the structure,

fastapi app main folder
|
->app
  |
  -> main.py
  -> util.py
  -> config.py
  -> test.py

i know if using something like this will work for docker

from .util import search_card_price

but with this solution, is not working on my local terminal run without docker. i need to know how to solve both at the same time

here is my dockerfile

# Dockerfile

# pull the official docker image
FROM python:3.9.4-slim

# set work directory
WORKDIR /app

# set env variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# install dependencies
COPY requirements.txt .
RUN pip install -r requirements.txt

# copy project
COPY . .

and docker compose

version: '3.8'

services:
  web:
    build: .
    command: bash -c 'uvicorn app.main:app --host 0.0.0.0'
    volumes:
      - .:/app
    expose:
      - 8000
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.fastapi.rule=Host(`testing.localhost`)"

  traefik:
    image: traefik:v2.2
    ports:
      - 80:80
      - 8081:8080
    volumes:
      - "./traefik.dev.toml:/etc/traefik/traefik.toml"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"