Fix issues / finalize Ghost setup

Thank you @vmarkovtsev for creating this doc with the list of tasks left to finalize a proper ghost setup

https://docs.google.com/spreadsheets/d/15ysW90Onf5cdYV-4SXd-JK7YzjOkLLq8EX6VUbgA4eg/edit#gid=0

@znegrin please review and let me know if you have any questions. More context in this issue: https://github.com/src-d/blog/issues/282