在Cloud9 IDE上运行Go Web服务器

im kinda confused on how to run a go lang webserver on Cloud9IDE.. This is my simple go server i am attempting to run:
https://ide.c9.io/amanuel2/golangpractice

I tried to click run then went to the url it wants me to go but it told me 404 not found... And i also saw this is the output in the command line when i click run on cloud9:

Your code is running at https://golangpractice-amanuel2.c9users.io.
Important: use os.Getenv(PORT) as the port and os.Getenv(IP) as the host in your scripts!

2016/03/14 11:45:51 Listening on port 8080 ... 

Please help!

The 404 you're seeing is from line 142 of webserver.go so your app actually is running properly. From your code, it looks like you have a route for /item/name so try going to https://golangpractice-amanuel2.c9users.io/item/name and you'll get something there.

All other routes are giving 404's because of line 142.