Docs: explain how to build a 2D map too #392

	name: CI clang-format

	on: [push, pull_request]

	jobs:
	build:
	name: ${{ matrix.name }}
	runs-on: ${{ matrix.os }}

	strategy:
	fail-fast: false
	matrix:
	# Github Actions requires a single row to be added to the build matrix.
	# See https://help.github.com/en/articles/workflow-syntax-for-github-actions.
	name: [
	clang-format-check
	]

	include:
	- name: clang-format-check
	os: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@master

	- name: Git submodule
	run: \|
	git submodule sync
	git submodule update --init --recursive

	- name: Install Dependencies
	run: \|
	sudo apt install clang-format-11 -yq
	pip3 install --user -r .github/python_clang_format_reqs.txt

	- name: Check code style
	run: \|
	echo "TASK=lint_all" >> $GITHUB_ENV
	bash .github/check_style.sh

Provide feedback