$  git clone https://github.com/harryliu123/docker-learn.git
$  cd docker-learn
$  docker build -t <image_name>:<tag> . --no-cache -f <Dockerfile>
$  docker run -it -d -p <你想要開放的port>:8080 <image_name>:<tag>
$  curl http:https://127.0.0.1:<你想要開放的port>/ping  會出現  Hello World

$  git clone https://github.com/harryliu123/docker-learn.git
$  cd docker-learn
$  docker build -t helloword:v0.1 . --no-cache -f Dockerfile
$  docker run -it -d -p 8081:8080 helloword:v0.1
$  curl http:https://127.0.0.1:8081/ping  會出現  Hello World

## 如果是使用katacoda Lab 環境由於他預設開放80 port所以請修改port
$  docker run -it -d -p 80:8080 helloword:v0.1
$  curl <https://2886795294-80-cykoria03.environments.katacoda.com>/ping  會出現  Hello World

$  git clone https://github.com/harryliu123/docker-learn.git
$  cd docker-learn
$  docker build -t helloword:java . --no-cache -f Dockerfile-java
$  docker run -it  helloword:java

## 查看剛剛透過dockerfile 產生的images
$ docker images

	REPOSITORY                   TAG                 IMAGE ID            CREATED             SIZE
	helloworld                   java                993df71eb7fe        3 hours ago         147MB

## 替image下一個tag
$ docker tag helloworld:java  <帳號>/helloword-java
$ docker images

	REPOSITORY                   TAG                 IMAGE ID            CREATED             SIZE
	<帳號>/helloword-java         latest              993df71eb7fe        3 hours ago         147MB
	helloworld                   java                993df71eb7fe        3 hours ago         147MB

## 登入docker hub
$ docker login

	Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head 		over to https://hub.docker.com to create one.
	Username: *****
	Password:
	WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
	Configure a credential helper to remove this warning. See
	https://docs.docker.com/engine/reference/commandline/login/#credentials-store

	Login Succeeded

## 上傳
$ docker push <帳號>/helloword-java

	The push refers to repository [docker.io/harry101031/helloword-java]
	8790a344e219: Pushed
	bd6888799faa: Pushed
	ace0eda3e3be: Pushed
	latest: digest: sha256:041e794a1830abb0a6ba2f7712e09071131b65afb8724d6a5f377387cc64548e size: 951