initial version

just copy from the video demo
copy initial version to separate file

The code is remain the server, and this version is still use the demo
server
user listen
Can get the data from localhost

Create/Update can't work for now
first version of Event

1. use local storage
2. just a basic action like create/delete/edit
3. a issue: click a delete, there're event properties appended on the
URL, I can't find the reason