Here is the procedure to install nodejs, npm and ourjs on Debian.
1) Choose Amazon free tier EC2 instance
My choice is debian-squeeze-amd64-pvm-2014-07-21-ebs,
Memory (GiB) 0.613
There is no default administrator account by default。
There is a default user "guest"，password is "123456"
Here is the way to create an administrator user account.
1) Change CRYPTOKEY
After install you'd better change the CRYPTOKEY in ourjs/config.magazine.js first, this key is used for encrypt the password。Once you change the CRYPTOKEY, you can't log in with "guest" any more.