"ddev describe" should show direct ephemeral port/url via localhost

[rfay]

What happened (or feature request):

docker ps shows the localhost port that nginx is listening on, which can often be useful when things go wrong. For example, in the example below, you can easily hit the webserver at http://localhost:32795.

We should show the direct/localhost URL in ddev describe.

76d9bc4f6cb8 drud/nginx-php-fpm-local:v1.2.2 "/start.sh" 26 hours ago Up 26 hours (healthy) 0.0.0.0:32795->80/tcp, 0.0.0.0:32794->8025/tcp ddev-d8git-web

What you expected to happen:

How to reproduce this:

Version: Please include the output of ddev version, docker version and the project's .ddev/config.yaml.

Anything else do we need to know:

Related source links or issues:

Please use a complexity rating of 1-5 (5 is high) for a feature request. (High complexity implies more PR planning)