Set CONN_MAX_AGE to 60 seconds -- fixes #710

Setting the value in the production config.

{{cookiecutter.project_slug}}/config/settings/production.py

@@ -182,12 +182,14 @@ DATABASES = {
         'PASSWORD': env('RDS_PASSWORD'),
         'HOST': env('RDS_HOSTNAME'),
         'PORT': env('RDS_PORT'),
+        'CONN_MAX_AGE': 60,
     }
 }
 {% else %}
 # Use the Heroku-style specification
 # Raises ImproperlyConfigured exception if DATABASE_URL not in os.environ
 DATABASES['default'] = env.db('DATABASE_URL')
+DATABASES['default']['CONN_MAX_AGE'] = 60
 {%- endif %}
 
 # CACHING