From 2.7 to 2.8

1. Stop server & resque

2. Update code & db

# Get latest code
sudo -u gitlab git pull origin stable

# Install libs
sudo -u gitlab bundle install --without development test

# update db
sudo -u gitlab bundle exec rake db:migrate RAILS_ENV=production

# update gitolite hooks
sudo -u gitlab bundle exec rake gitlab:gitolite:write_hooks RAILS_ENV=production

3. Start web server & Resque