how to change the default port?

[GoogleCodeExporter]

i sets port as 8888,  but the server still running on port 8080. how can i
get it down. 

i try to add these code  join config.rb and app.rb. but it no work.
set :port, 888

Original issue reported on code.google.com by zhongxingdou on 15 Apr 2010 at 9:14

[GoogleCodeExporter]

you must do that when starting the dev server, just run "dev_appserver.rb" and 
it shows you all the options

e.g.for running dev server on port 8888 and your current directory has the app:

dev_appserver.rb --port=8888 . 

of course you can't change the port on Google hosted app engine

Original comment by rsaccon on 16 Apr 2010 at 10:12