Set the number of gunicorn worker to 8 by default

Author: tdruez

docker-compose.yml

@@ -33,7 +33,7 @@ services:
     command: sh -c "
         ./manage.py migrate &&
         ./manage.py collectstatic --no-input --clear &&
-        gunicorn scancodeio.wsgi:application --bind :8000 --timeout 600 --workers 2"
+        gunicorn scancodeio.wsgi:application --bind :8000 --timeout 600 --workers 8"
     env_file:
       - docker.env
     expose: