Write document about how to append ssh public key. #69 #57 (#70)
Write document about how to append ssh public key. #69 #57 (#70)

* Write document about how to append ssh public key.

* Replace links with official docs

Basically, we should use official documents rather than unofficial documents if it exists. ;)

coderdojo-japan/dojopaas,coderdojo-japan/dojopaas,coderdojo-japan/dojopaas