Update docs with docker install and other walkthrough improvements #828

	---
	# yamllint disable-line rule:truthy
	on:
	push:
	branches:
	- master
	paths:
	- "src/**"
	- "oscal"
	pull_request:
	types: [opened, synchronize, reopened]
	workflow_dispatch:
	branches:
	- master
	name: Process Content
	env:
	HOME_REPO: GSA/fedramp-automation
	jobs:
	validate-and-publish-content:
	name: Content Validation Checking, Conversion and Validation
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@9a9194f87191a7e9055e3e9b95b8cfb13023bb08
	with:
	path: git-content
	submodules: recursive
	# Only update `fetch-depth` for debugging on branches. If not, this
	# action cannot see other branches for names for the PR to push back
	# changes. So, on PR branches without this, you will have errors.
	# fetch-depth: 0
	- name: Build content generator
	run: make init-content
	working-directory: git-content
	- name: Validate Content
	run: make test-content
	working-directory: git-content
	- name: Auto-convert Content
	run: make build-content
	working-directory: git-content
	- name: Setup SSH key
	# Only do this on GSA/master
	if: github.repository == env.HOME_REPO && github.ref == 'refs/heads/master'
	run: \|
	eval "$(ssh-agent -s)"
	ssh-add - <<< "${{ secrets.SSH_PRIVATE_KEY }}"
	- name: Publish Artifacts
	# Only do this on GSA/master
	if: github.repository == env.HOME_REPO && github.ref == 'refs/heads/master'
	uses: stefanzweifel/[email protected]
	with:
	repository: git-content
	commit_message: Publishing auto-converted artifacts
	commit_user_name: OSCAL GitHub Actions Bot
	commit_user_email: [email protected]
	commit_author: OSCAL GitHub Actions Bot <[email protected]>

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