Static files not loading using nginx and docker

I'm having approximately the same error as in this question, as concerning Django, all my pages are loaded correctly but not my static files. I guess it has something to do with an error in my configuration files, however even though I've been searching for quite some time, I couldn't find anything to solve my problem.

Here is my Django Dockerfile :

FROM python:3.10.5-alpine

RUN pip install --upgrade pip

RUN wget https://upload.wikimedia.org/wikipedia/commons/b/b9/First-google-logo.gif -O media/media.gif

COPY ./requirements.txt .
RUN pip install -r requirements.txt
COPY ./src /app

WORKDIR /app

COPY ./entrypoint.sh /
ENTRYPOINT ["sh", "/entrypoint.sh"]

nginx.conf

upstream django {
    server django_gunicorn:8000;
}

server {
    listen 80;
    server_name 127.0.0.1;

    location / {
        proxy_pass http://django;
    }

    location /static/ {
        alias /static/;
    }

    location /media/ {
        alias /media/;
    }
}

nginx Dockerfile

FROM nginx:1.19.0-alpine

COPY ./nginx.conf /etc/nginx/conf.d/nginx.conf

docker-compose.yml

version: '3.7'

services:
  django_gunicorn:
    volumes:
      - static:/static
      - media:/media
    env_file:
      - env
    build:
      context: .
    ports: 
      - "8000:8000"
  nginx:
    build: ./nginx
    volumes:
      - static:/static
      - media:/media
    ports:
      - "80:80"
    depends_on:
      - django_gunicorn

volumes:
  static:
  media:

And I get errors like that :

testapp-django_gunicorn-1  |
testapp-django_gunicorn-1  | 9771 static files copied to '/app/static'.
testapp-django_gunicorn-1  | [2022-07-21 12:27:36 +0000] [9] [INFO] Starting gunicorn 20.1.0
testapp-django_gunicorn-1  | [2022-07-21 12:27:36 +0000] [9] [INFO] Listening at: http://0.0.0.0:8000 (9)
testapp-django_gunicorn-1  | [2022-07-21 12:27:36 +0000] [9] [INFO] Using worker: sync
testapp-django_gunicorn-1  | [2022-07-21 12:27:36 +0000] [10] [INFO] Booting worker with pid: 10
testapp-nginx-1            | 172.20.0.1 - - [21/Jul/2022:12:30:45 +0000] "GET /scripts/ HTTP/1.1" 200 17460 "http://127.0.0.1/scripts/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36" "-"
testapp-nginx-1            | 172.20.0.1 - - [21/Jul/2022:12:30:45 +0000] "GET /static/scripts/bootstrap/css/bootstrap.css HTTP/1.1" 404 555 "http://127.0.0.1/scripts/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36" "-"
testapp-nginx-1            | 2022/07/21 12:30:45 [error] 30#30: *1 open() "/static/scripts/bootstrap/css/bootstrap.css" failed (2: No such file or directory), client: 172.20.0.1, server: 127.0.0.1, request: "GET /static/scripts/bootstrap/css/bootstrap.css HTTP/1.1", host: "127.0.0.1", referrer: "http://127.0.0.1/scripts/"

EDIT : entrypoint.sh

#!/bin/sh

python manage.py migrate
python manage.py collectstatic

gunicorn main.wsgi:application --bind 0.0.0.0:8000