Heroku error:Permission denied (publickey)

$ git push heroku master

显示如下提示：

Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

你需要将公钥同步到Heroku上：

$ heroku keys:add ~/.ssh/*.pub

如果没有，那么heroku会提醒你新建一个公钥用：

heroku keys:add