Mention that `sudo -u postgres` throws an error (#458) #273

	name: Build setup guides
	on:
	push:
	branches:
	- master
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Build
	run: \|
	git config user.name github-actions
	git config user.email github-actions@github.com
	ruby build.rb
	if ! git diff --exit-code
	then
	git add .
	git commit -m "setup guides generated"
	git push
	fi

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