Updated Readme with section How to contribute (#12) #10

	name: Doxygen

	on:
	repository_dispatch:
	push:
	branches:
	- master
	- gh-pages

	# In that case do the job 'make_and_deploy_doxygen'
	jobs:
	make_and_deploy_doxygen:
	runs-on: ubuntu-latest
	# which needs the following steps to be executed:
	steps:
	# 1. Checkout current branch of GitHub repository.
	- name: Checkout current branch
	uses: actions/checkout@v2
	# 2. Install doxygen and its auxiliary components.
	- name: Install doxygen and latex components
	run: sudo apt-get update; sudo apt-get install -y doxygen graphviz texlive-full
	# 3. Create the doxygen pages.
	- name: Create the doxygen
	run: \|
	git clone https://github.com/metacall/core.git
	mkdir core/build && cd core/build
	cmake -DOPTION_BUILD_DOCS=ON ..
	make api-docs
	- name: Moving Files
	run: \|
	mv ./core/build/docs/api-docs ./api

	# Deploy to GitHub Pages
	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./

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