Instructions update: install postfix separately, new privilege to mysql users, sockets dir. Fixes #3639
Created by: axilleas
- As noted in #3596, I removed postfix from deps and added a note for the user to add it separately.
- Updated update instructions and added a step to grant the additional privilege to the mysql user. Without it, backup fails.
- Also, in a fresh installation the
tmp/sockets
directory must be created otherwise gitlab service fails to start. See #3639.