I want connet my django project with postgresql and I face this problem could not translate host name "postgres.railway.internal

DATABASES = { 'default': {

    'ENGINE': 'django.db.backends.postgresql',

    'NAME': 'railway',

    'USER': 'postgres',

    'PASSWORD': 'DthcDHERJBIMhRhPkifnnrevSozYGRTE',

    'HOST': 'postgres.railway.internal',

    'PORT': '5432',
}

this is my postgresql database setup on my setting