Merge branch 'dev/gunicorn' into 'develop'

Add SILENT_START env variable

See merge request !1006

src/hub/settings/default.py

@@ -12,6 +12,7 @@ default_env = environ.FileAwareEnv(
     SERVE_BACKOFFICE=(bool, True),
     SERVE_FRONTEND=(bool, True),
     SERVE_MODULE_OUTPUT=(bool, True),
+    SILENT_START=(bool, False),
     SECRET_KEY=(str, None),
     SSO_WARNING=(bool, True),
     DJANGO_SECRET_KEY=(str, None),
@@ -19,6 +20,8 @@ default_env = environ.FileAwareEnv(
 
 
 def print_banner(message: str, filler: str = '*'):
+    if default_env('SILENT_START'):
+        return
     print(filler * 72)
     print(filler, message)
     print(filler * 72)