Multiple apps runs on one bokeh server under LAN

Dear all:

I using python3 to write a app(,

py code: curdoc().add_root(mylayout)

and then using bokeh server to run it

bokeh cmd: bokeh serve --show

Actually everything seems correct, but just single app!!!

If I want to show more apps and runs in the same bokeh server under local area net,
How should I do to write python code (how to add to doc?or session?)?? can give me a example??
what's kind of cmd can run multiple apps in server???

thanks a lot ...