EC2にDocker＋Django＋PostgresqlでSuperuserがつくれないです。

$docker-compose -f production.yml run django python3 manage.py makemigrations
$docker-compose -f production.yml run django python3 manage.py migrate
$docker-compose -f production.yml up --build -d
$docker-compose -f production.yml exec django python3 manage.py createsuperuser


`Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/environ/environ.py", line 273, in get_value
value = self.ENVIRON[var]
File "/usr/local/lib/python3.9/os.py", line 679, in **getitem**
raise KeyError(key) from None
KeyError: 'DATABASE_URL'`

`During handling of the above exception, another exception occurred:`

`Traceback (most recent call last):
File "/app/manage.py", line 31, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/**init**.py", line 401, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.9/site-packages/django/core/management/**init**.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/**init**.py", line 231, in fetch_command
settings.INSTALLED_APPS
File "/usr/local/lib/python3.9/site-packages/django/conf/**init**.py", line 82, in **getattr**
self._setup(name)
File "/usr/local/lib/python3.9/site-packages/django/conf/**init**.py", line 69, in _setup
self._wrapped = Settings(settings_module)
File "/usr/local/lib/python3.9/site-packages/django/conf/**init**.py", line 170, in **init**
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/usr/local/lib/python3.9/importlib/**init**.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 855, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "/app/config/settings/production.py", line 8, in <module>
from .base import *  # noqa
File "/app/config/settings/base.py", line 43, in <module>
DATABASES = {"default": env.db("DATABASE_URL")}
File "/usr/local/lib/python3.9/site-packages/environ/environ.py", line 204, in db_url
return self.db_url_config(self.get_value(var, default=default), engine=engine)
File "/usr/local/lib/python3.9/site-packages/environ/environ.py", line 277, in get_value
raise ImproperlyConfigured(error_msg)
django.core.exceptions.ImproperlyConfigured: Set the DATABASE_URL environment variable`

#!/bin/bash

set -o errexit
set -o pipefail
set -o nounset




if [ -z "${POSTGRES_USER}" ]; then
    base_postgres_image_default_user='postgres'
    export POSTGRES_USER="${base_postgres_image_default_user}"
fi
export DATABASE_URL="postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}"

postgres_ready() {
python << END
import sys

import psycopg2

try:
    psycopg2.connect(
        dbname="${POSTGRES_DB}",
        user="${POSTGRES_USER}",
        password="${POSTGRES_PASSWORD}",
        host="${POSTGRES_HOST}",
        port="${POSTGRES_PORT}",
    )
except psycopg2.OperationalError:
    sys.exit(-1)
sys.exit(0)

END
}
until postgres_ready; do
  >&2 echo 'Waiting for PostgreSQL to become available...'
  sleep 1
done
>&2 echo 'PostgreSQL is available'

exec "$@"

FROM node:10-stretch-slim as client-builder

ARG APP_HOME=/app
WORKDIR ${APP_HOME}

COPY ./package.json ${APP_HOME}
RUN npm install && npm cache clean --force
COPY . ${APP_HOME}
RUN npm run build

ARG PYTHON_VERSION=3.9-slim-buster

# define an alias for the specfic python version used in this file.
FROM python:${PYTHON_VERSION} as python

# Python build stage
FROM python as python-build-stage

ARG BUILD_ENVIRONMENT=production

# Install apt packages
RUN apt-get update && apt-get install --no-install-recommends -y \
  # dependencies for building Python packages
  build-essential \
  # psycopg2 dependencies
  libpq-dev

# Requirements are installed here to ensure they will be cached.
COPY ./requirements .

# Create Python Dependency and Sub-Dependency Wheels.
RUN pip wheel --wheel-dir /usr/src/app/wheels  \
  -r ${BUILD_ENVIRONMENT}.txt


# Python 'run' stage
FROM python as python-run-stage

ARG BUILD_ENVIRONMENT=production
ARG APP_HOME=/app

ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
ENV BUILD_ENV ${BUILD_ENVIRONMENT}

WORKDIR ${APP_HOME}

RUN addgroup --system django \
  && adduser --system --ingroup django django


# Install required system dependencies
RUN apt-get update && apt-get install --no-install-recommends -y \
  # psycopg2 dependencies
  libpq-dev \
  # Translations dependencies
  gettext \
  # cleaning up unused files
  && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
  && rm -rf /var/lib/apt/lists/*

# All absolute dir copies ignore workdir instruction. All relative dir copies are wrt to the workdir instruction
# copy python dependency wheels from python-build-stage
COPY --from=python-build-stage /usr/src/app/wheels  /wheels/

# use wheels to install python dependencies
RUN pip install --no-cache-dir --no-index --find-links=/wheels/ /wheels/* \
  && rm -rf /wheels/


COPY --chown=django:django ./compose/production/django/entrypoint /entrypoint
RUN sed -i 's/\r$//g' /entrypoint
RUN chmod +x /entrypoint


COPY --chown=django:django ./compose/production/django/start /start
RUN sed -i 's/\r$//g' /start
RUN chmod +x /start


# copy application code to WORKDIR
COPY --from=client-builder --chown=django:django ${APP_HOME} ${APP_HOME}


# make django owner of the WORKDIR directory as well.
RUN chown django:django ${APP_HOME}

USER django

ENTRYPOINT ["/entrypoint"]