idhub entrypoint: add gunicorn

docker/idhub.entrypoint.sh

@@ -99,9 +99,14 @@ config_oidc4vp() {
         done
 }
 
-main() {
-        idhub_dir='/opt/idhub'
-        cd "${idhub_dir}"
+runserver() {
+        if [ ! "${DEBUG:-}" = "true" ]; then
+                ./manage.py collectstatic
+                gunicorn --access-logfile - --error-logfile - --workers 4 -b :${PORT} trustchain_idhub.wsgi:application
+        else
+                ./manage.py runserver 0.0.0.0:${PORT}
+        fi
+}
 
 check_app_is_there() {
         if [ ! -f "./manage.py" ]; then
@@ -119,11 +124,7 @@ main() {
 
         inject_env_vars
 
-        if [ ! "${DEBUG:-}" = "true" ]; then
-                ./manage.py collectstatic
-        fi
-
-        ./manage.py runserver 0.0.0.0:${PORT}
+        runserver
 }
 
 main "${@}"