Update build & (auto)publishing info in README.md (w3c#1628)

Author: sideshowbarker

README.md

@@ -5,7 +5,7 @@ This is the repository for the W3C WebAuthn Working Group, producing the draft *
 
 * [The editor's copy is available at https://w3c.github.io/webauthn/](https://w3c.github.io/webauthn/), or in the [`gh-pages` branch of this repository](https://github.com/w3c/webauthn/blob/gh-pages/index.html).
   - The current *offically-published working-draft snapshot* [is here: https://www.w3.org/TR/webauthn/](https://www.w3.org/TR/webauthn/).
-* [The build history is available at Travis-CI.org](https://travis-ci.org/w3c/webauthn/builds)
+* [The build history is available from the repo Actions tab](https://github.com/w3c/webauthn/actions)
 * [W3C WebAuthn Blog](https://www.w3.org/blog/webauthn/)
 * [Web platform tests repository](https://github.com/web-platform-tests/wpt/tree/master/webauthn)
 
@@ -29,38 +29,19 @@ $ bikeshed watch
 
 # Bikeshed Installation and Setup
 
-You will need to have the Python tools `pygments` and `bikeshed` to build the draft. Pygments can be obtained via `pip`, but Bikeshed will need to be downloaded with `git`:
+See the full instructions at https://tabatkins.github.io/bikeshed/#installing.
 
-```
-git clone --depth=1 --branch=main https://github.com/tabatkins/bikeshed.git ./bikeshed
-pip install pygments
-pip install --editable ./bikeshed
-cp -R .spec-data/* ./bikeshed/bikeshed/spec-data
-```
-
-Alternatively, you can use the [Vagrant VM with `bikeshed` already installed](vagrant/bikeshed), or the [Docker image](docker/bikeshed).
-
-# Updating copies of Bikeshed data files stored in this repo
-
-For the purpose of giving consistent builds, copies of some Bikeshed data files are stored in this repository and used by the CI build to auto-publish the https://w3c.github.io/webauthn/ draft.
-
-The repository copies of those Bikeshed data files must be periodicallly updated and re-committed. To update and re-commit them, run the following commands:
+You will need to have the Python 3.7 or later installed. Once you do have Python 3.7 or later installed, to install Bikeshed itself, run the following:
 
 ```
-cd <your local w3c/webauthn repo clone or fork clone>
-git checkout master
-git pull           # if necessary...
-git checkout -b <a new branch name>
-./update-bikeshed-cache.sh \
-  && git add .spec-data .bikeshed-include \
-  && git commit -m "Bikeshed spec data update" . \
-  && git push
-<in the w3c/webauthn repo create a pull request for this new branch, have it reviewed and merged>
+pip3 install bikeshed && bikeshed update
 ```
 
+When that is completed, Bikeshed should be installed, and the `bikeshed` command should work in your shell.
+
 # Continuous Integration & Branches
 
-This repository uses `.deploy-output.sh` to generate the Editor's Draft on the `gh-pages` branch upon every merge to `master`. In order to prevent failed merges during continuous integration, the formatted Editor's Draft should not be checked in to `master`, and it is in the `.gitignore` file.
+https://w3c.github.io/webauthn/ is autopublished from the `gh-pages` branch on every push to the `main` branch, using https://github.com/w3c/webauthn/blob/main/.github/workflows/build-validate-publish.yml to configure the autopublishing behavior.
 
 # Creating a new Working Draft