Remove DB name, use same as DB USER

sikweb/settings-sample-prod.py

@@ -41,7 +41,7 @@ TELEGRAM_BOT_TOKEN = os.getenv('TG_BOT_TOKEN')
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.postgresql_psycopg2',
-        'NAME': os.getenv('DB_NAME', '<none>'),
+        'NAME': os.getenv('DB_USER', '<none>'),
         'USER': os.getenv('DB_USER', '<none>'),
         'PASSWORD': os.getenv('DB_PASSWD', '<none>'),
         'HOST': os.getenv('DB_HOST', '127.0.0.1'),