如何把一個檔案包成docker_image，以下是一個範例：
首先要先建立一個Dockerfile：

FROM python:3.9.10-alpine3.15 

# ADD . /test-project
COPY ./app /test-project
WORKDIR /test-project

RUN pip install -r requirements.txt

EXPOSE 5000

CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app", "--preload"]

stages:          
  - build
  - test

build-docker-image:
  image: docker:latest
  stage: build
  tags:
    - docker
  script:
    - docker build -t hello .

lint-test-job:
  tags:
    - macos  
  stage: test   
  script:
    - echo "Linting code... This will take about 10 seconds."
    - echo "No lint issues found."

當你在流水線看到這樣基本上你就已經完成了。