[w3c/webauthn] c143aa: Add Dockerfile with Bikeshed installed (#942)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: c143aa0c98a4b2eb66c8990e84b20bf14959001f
      https://github.com/w3c/webauthn/commit/c143aa0c98a4b2eb66c8990e84b20bf14959001f
  Author: Emil Lundberg <emil@emlun.se>
  Date:   2018-06-13 (Wed, 13 Jun 2018)

  Changed paths:
    M README.md
    A docker/bikeshed/Dockerfile
    A docker/bikeshed/README.md

  Log Message:
  -----------
  Add Dockerfile with Bikeshed installed (#942)

* Add Dockerfile with bikeshed

* Remove unnecessary symbolic link from bikeshed Dockerfile

* Add --no-cache to docker build instructions

* Add descriptions to docker run instructions

* Simplify Dockerfile build instructions

* Add "$BROWSER index.html" step to Dockerfile one-shot usage instructions

* Mention Docker image in root README

* Point out that Docker image requires Docker installed

* Point out that docker run must be run before docker start

* Add rebuild instructions to docker image readme



      **NOTE:** This service been marked for deprecation: https://developer.github.com/changes/2018-04-25-github-services-deprecation/

      Functionality will be removed from GitHub.com on January 31st, 2019.