Slides available in http://hernani.pt/talks/deployer-phplx

You can find them here

Updating Drupal 8 sites via composer can be hard. If you are following good practices you have your website code in a git repository, and you have an environment where you can test your changes before deploying them to production. 

Here are the typical steps you need to do when Drupal core or contrib module is updated:

Last month we took the challenge to update drupal.pt from Drupal 6 to Drupal 8.1.
Drupal.pt is the website for the portuguese Drupal community and was originally developed in 2010, slightly before our first drupalcamp.

The website contains some information pages, details about events in the community, links to user profiles, social media information and sites developed in Portugal in Drupal.

I finally got the time, and to celebrate the launch of Drupal 8 RC1, I converted the blog to Drupal 8!