Updated README #43

	name: Deploy

	# main 브랜치에 pr이 생겼을 때 동작
	on:
	pull_request:
	branches:
	- main
	types:
	- closed

	permissions:
	contents: read

	jobs:
	run-docker-image-on-ec2:
	# merge 되었을 때 실행
	if: github.event.pull_request.merged == true

	runs-on: self-hosted
	steps:
	# docker image 받기
	- name: docker pull
	run: sudo docker pull ${{ secrets.DOCKERHUB_USERNAME }}/forgrad-app

	# 기존의 컨테이너 중지
	- name: docker stop container
	run: sudo docker stop $(sudo docker ps -q) 2>/dev/null \|\| true

	# 새로운 컨테이너 실행
	- name: docker run new container
	run: sudo docker run --name forgrad-app --rm -d -p 8080:8080 -e TZ=Asia/Seoul -v /home/ubuntu/logs:/log ${{ secrets.DOCKERHUB_USERNAME }}/forgrad-app

	# 미사용 이미지 정리
	- name: delete old docker image
	run: sudo docker system prune -f

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