feat: Add GitHub Action as a contributor #2

	name: First Time Contributor Action

	on:
	pull_request:
	types: [opened]

	jobs:
	first_time_contributor:
	runs-on: ubuntu-latest
	steps:
	- name: Install jq
	run: sudo apt-get install -y jq

	- name: Check if contributor is first-timer
	id: check
	run: \|
	IS_FIRST_TIME_CONTRIBUTOR=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" https://api.github.com/repos/open-sauced/guestbook/pulls?state=closed&author=${{ github.actor }} \| jq '. \| length')
	echo "::set-output name=is_first_time_contributor::$IS_FIRST_TIME_CONTRIBUTOR"
	shell: bash

	- name: Post comment for first-time contributors
	if: contains(github.event.pull_request.title, 'as a contributor')
	run: \|
	PR_COMMENT="Congratulations on completing Chapter 5 of the Intro to OSS Course with your contribution to this repository! You're almost to the end of the course. Create a highlight of your contribution to our guestbook using the instructions in [chapter 6](https://github.com/open-sauced/intro/blob/main/06-the-secret-sauce.md) and share it with us!"
	curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" -X POST -d "{\"body\":\"$PR_COMMENT\"}" "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments"

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