ADD: support for validating feeds (RSS/Atom/JsonFeed) #28

	name: "Dogfooding"

	# Why is this called "dogfooding"? https://en.wikipedia.org/wiki/Eating_your_own_dog_food

	on:
	push:

	workflow_dispatch:

	jobs:
	dogfooding:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Set up Go
	uses: actions/setup-go@v4
	with:
	go-version: 1.21

	- name: Build
	run: \|
	go build -o ./fflint cmd/fflint/main.go

	- name: Check favicon.ico
	run: \|
	./fflint ico --show-tests=all docs/favicon.ico

	- name: Check markdown frontmatter
	run: \|
	./fflint frontmatter --required=title "docs/*/.md"

	# LATER: build website w/Jekyll and test the generated files

	- name: Generate reports
	run: \|
	echo "# Dogfooding fflint" >$GITHUB_STEP_SUMMARY
	echo "## Extensions in use" >>$GITHUB_STEP_SUMMARY
	./fflint ext --output=markdown "./**" >>$GITHUB_STEP_SUMMARY
	echo "" >>$GITHUB_STEP_SUMMARY
	echo "## Content types in use" >>$GITHUB_STEP_SUMMARY
	./fflint mimetype --output=markdown "./**" >>$GITHUB_STEP_SUMMARY

Provide feedback