Update README.md #15

	name: ci

	on:
	push:
	branches:
	- 'main'

	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Login to Docker Hub
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Build and push images
	run: \|
	docker build java_coinbase_producer/ -f java_coinbase_producer/java_coinbase_producer.Dockerfile -t kwangjong/java-coinbase-producer
	docker build spark_stream_processor/ -f spark_stream_processor/spark_stream_processor.Dockerfile -t kwangjong/spark-stream-processor
	docker build cassandra/ -f cassandra/cassandra.Dockerfile -t kwangjong/cassandra
	docker build grafana/ -f grafana/grafana.Dockerfile -t kwangjong/grafana
	docker build hdfs/ -f hdfs/hdfs.Dockerfile -t kwangjong/hdfs
	docker build hdfs/ -f hdfs/hdfs-nn.Dockerfile -t kwangjong/hdfs-nn
	docker build hdfs/ -f hdfs/hdfs-dn.Dockerfile -t kwangjong/hdfs-dn
	docker build go_kafka_consumer/ -f go_kafka_consumer/go_kafka_consumer.Dockerfile -t kwangjong/go-kafka-consumer
	docker push kwangjong/java-coinbase-producer
	docker push kwangjong/spark-stream-processor
	docker push kwangjong/cassandra
	docker push kwangjong/grafana
	docker push kwangjong/hdfs
	docker push kwangjong/hdfs-nn
	docker push kwangjong/hdfs-dn
	docker push kwangjong/go-kafka-consumer

Provide feedback