Author: Tianle Yuan

A good model for Docker Image initialization

From what we learned: Basic guidance of docker, we learned how to use Docker compose to run containers in parallel. In that learning, we directly use swiftlang/swift:nightly-focal from the Docker repo. Here, we will learn how to create and use our own Docker Image in the Docker compose.

There are three steps:

1. Create a file named Dockerfile in your folder. About FROM, MAINTAINER, and RUN, learn from: What-is-dockerfile
   .dockerfile

   FROM swiftlang/swift:nightly-focal
   
   MAINTAINER simpli
   
   RUN apt-get update
   RUN apt update
   RUN apt -y install zsh
   RUN apt -y install curl
   RUN apt -y install vim
   RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
   RUN apt-get -y install -y language-pack-en
   RUN zsh
   

2. Then run docker build -t simpli_image [location of your dockerfile] to build a Docker Image.
3. Finally, the yml below as docker-compose run --rm dev:
   .yml

   services:
     dev:
       image: simpli_image #"swiftlang/swift:nightly-focal"
       volumes:
         - your directory /swift:/code
       environment:
         - USER=your name 
   

Now you are using your own Docker Image in which zsh & oh-my-zsh have been pre-installed.

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