Merge branch...

Merge branch '165-on-a-have-node-with-a-lot-of-users-sometimes-mysql-connections-drop-causing-rendering-errors' into 'main'

Resolve "On a have node, with a lot of users, sometimes mysql connections drop, causing rendering errors"

See merge request !144

backend/app.py

@@ -62,6 +62,7 @@ app = Flask(__name__)
 
 app.config["SECRET_KEY"] = SECRET_KEY
 app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
+app.config["SQLALCHEMY_ENGINE_OPTIONS"] = {'pool_pre_ping': True}
 app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = SQLALCHEMY_TRACK_MODIFICATIONS
 
 app.logger.setLevel(logging.INFO)