collaborative whiteboard for sequence diagram design

The idea is to create (develop), a collaborative pizzarra in real time. * Have the person in charge of creating the room generate a link so that other users can enter the session. * The person in charge of creating the session can save what he worked on and when he wants, he can open it and continue working. *When the sequence diagram is finished designing, it can be generated in Java code. * That can be exported in architect enterprise Important: *Using Nodejs, express js and mysql Note: the code must be included in the delivery