Sync and merge upstream repository #69

	name: Sync and merge upstream repository
	on:
	workflow_dispatch:
	schedule:
	- cron: "0 8 * * *" #Runs at 8:00 UTC(5:00 in Korea) every day.

	jobs:
	merge:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Merge upstream
	run: \|
	git config --global user.name 'Hong-been'
	git config --global user.email '[email protected]'
	# "git checkout master" is unnecessary, already here by default
	git pull --unshallow # this option is very important, you would get
	# complains about unrelated histories without it.
	# (but actions/checkout@v2 can also be instructed
	# to fetch all git depth right from the start)
	git remote add upstream https://github.com/Tinkerbell-Green/need-compliments.git
	git fetch upstream
	git checkout master
	git merge -Xtheirs upstream/master
	git push origin master
	# etc

Provide feedback