more secure docker-compose example with clair support

[suntorytimed]

Summary

Improvement of solution for #1714

• uses SSL encryption for registry
• uses SSL encryption for frontend
• uses nginx for serving portus

[suntorytimed]

@mssola is there anything that I have to take care of in terms of travis-ci? I didn't change any of the src files for building the project. Are the docker-compose examples checked as well?

[mssola]

Sorry for the delay. Somehow this PR slipped through...

I think that this error is due to the original docker-compose.clair.yml file being used for integration tests purposes. So, I'd recommend changing the bin/integration/integration.rb file and change the compose_file method as follows (you will have to rebase first):

def compose_file
  profile = case ENV["PORTUS_INTEGRATION_PROFILE"]
            when /^ldap/
              ".ldap"
            else
              ".clair-insecure"
            end
  "docker-compose#{profile}.yml"
end

[suntorytimed]

Hi @mssola

thanks for reviewing the submit and for supplying me with a solution for the build errors. I have rebased my branch and added the necessary patch for /bin/integration/integration.rb

[suntorytimed]

instead of changing all the tests I decided to rename my compose file instead ;)

[suntorytimed]

For some reason Travis CI complained about git status. I have opened a new pull request (#1925)including the changes discussed in here.