add introduction in README.md #50

	name: Build and Deploy to GKE

	on:
	push:
	branches: [ "main" ]

	env:
	PROJECT_ID: ${{ secrets.GKE_PROJECT_ID }}
	GKE_CLUSTER: nodeflowcluster-a1 # TODO: update to cluster name
	GKE_ZONE: asia-east1 # TODO: update to cluster zone
	DEPLOYMENT_NAME: GitHub_k8s_deploy # TODO: update to deployment name

	jobs:
	setup-build-publish-deploy:
	name: Setup, Build, Publish, and Deploy
	runs-on: ubuntu-latest
	environment: production

	permissions:
	contents: 'read'
	id-token: 'write'

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	# Authentication via credentials json
	- id: 'auth'
	uses: 'google-github-actions/auth@v0'
	with:
	credentials_json: '${{ secrets.GCP_CREDENTIALS }}'

	- name: Docker configuration
	run: \|-
	echo ${{steps.auth.outputs.access_token}} \| docker login -u jounglab112a --password ilovejoung112A

	# Get the GKE credentials so we can deploy to the cluster
	- name: Set up GKE credentials
	uses: google-github-actions/get-gke-credentials@v0
	with:
	cluster_name: ${{ env.GKE_CLUSTER }}
	location: ${{ env.GKE_ZONE }}

	# Build and push the Docker image
	- name: BuildAndPublish
	working-directory: ./
	run: \|-
	bash bind.build.sh

	# Deploy the Docker image to the GKE cluster
	- name: Deploy
	working-directory: ./k8s_deployment/
	run: \|-
	bash k8s_setup.sh

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