• Install nokogiri and nokogumbo in OSX

brew install libxml2 libxslt
ARCHFLAGS="-arch x86_64" bundle exec gem install nokogiri
ARCHFLAGS="-arch x86_64" bundle exec gem install nokogumbo

• Discourse full https (including oauth callbacks …)

In file config/initializers/09-omniauth.rb:

OmniAuth.config.full_host = 'https://...domain...'