trivial. fix build error #75

	name: Build only
	on:
	pull_request:

	env:
	SERVICE: tks-batch
	TAG: ${{github.sha}}

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Login to DockerHub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: build image
	id: docker_build
	uses: docker/build-push-action@v2
	with:
	push: false
	tags: \|
	sktcloud/${{env.SERVICE}}:${{env.TAG}}

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