# Containarize an application

refer to [official documentation](https://docs.docker.com/get-started/workshop/02_our_app/)

## 創建container
基本上都照著[步驟](https://hlunlun.github.io/)做就行
- 創建映像檔

    sudo docker build -t <image name> .

-
:warning: 如果使用者不是root,所有docker指令前面都要加`sudo`

## 開發在遠端Ubuntu，跑在Windows的瀏覽器
refer to: [Using localhost for to access running](https://forums.docker.com/t/using-localhost-for-to-access-running-container/3148) container
1. 執行剛剛創建好的映象檔

    sudo docker run -d -p 3000:3000 docker_app

2. 查看執行的process

    sudo docker ps

3. 到本地端的瀏覽器拜訪網址: [localhost:3000](http://localhost:3000/)

## Remove ids and process of docker
1. Remove process

    sudo docker stop <id of process>

2. 查看所有執行中或已停止的process

    sudo docker ps -aq

3. 移除所有已停止的container

    sudo docker container prune

4. 移除不管是在執行中還是停止的所有container

    sudo docker rm -f $(sudo docker ps -aq)

## Host vs. Bridge
1. 如果要讓外網可以連到docker，`network`要用`host`

    sudo docker run -d --network host -p 3000:3000 <image_name>