I am trying to connect my django application with an oracle database in vain.
I added the TNS_ADMIN environment variable but the problem persists.
Here is the content of my tnsnames.ora file:

# tnsnames.ora Network Configuration File: C:appHPproduct21chomesOraDB21Home1NETWORKADMINtnsnames.ora
# Generated by Oracle configuration tools.

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xxx)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

LISTENER_XE =
  (ADDRESS = (PROTOCOL = TCP)(HOST = xxx)(PORT = 1521))


ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

It should be noted that I use SQL developer.
My database configuration in django:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.oracle',
        'NAME': os.environ.get("DB_NAME"),
        'USER': os.environ.get("DB_USER"),
        'HOST': os.environ.get("DB_HOST"),
        'POSRT': os.environ.get("DB_PORT"),
        'PASSWORD': os.environ.get("DB_PASS")
    }
}

docker-compose.yml file:

version: '3'
services:
  backend:
    container_name: bdr-backend
    build:
      context: .
    command: >
      sh -c "python manage.py makemigrations --noinput &&
      python manage.py migrate --noinput && 
      python manage.py runserver 0.0.0.0:8000"
    ports:
      - 8000:8000
    volumes:
      - ./backend:/backend
    env_file:
      - .env
    environment:
      - DEBUG=1
      - DB_HOST=${DB_HOST}
      - DB_NAME=${DB_NAME}
      - DB_USER=${DB_USER}
      - DB_PASS=${DB_PASS}
    depends_on:
      - redis
  redis:
    image: redis:7.0.5-alpine
    container_name: redis2
    expose:
      - 6379

I use docker docker desktop on windows 10.
How to solve this problem?