1. GitHub上创建仓库，配置Docker Hub账户密码

1.1 Git项目配置

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1.2 DockerHub创建仓库

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2. 编写yaml

# This workflow will build a Java project with Maven
# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
# https://docs.github.com/cn/actions/learn-github-actions/contexts#github-context
name: Java CI with Maven

on:
  push:
    branches:
      - master
      - dev
    tags:
      - v*

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Set up JDK 1.8
        uses: actions/setup-java@v1
        with:
          java-version: 1.8
      - name: Build with Maven
        run: mvn -B package --file pom.xml
      - name: BuildDockerImage
        run: docker build . --file Dockerfile --tag twwch/action-ci:${{ github.ref_name	 }}
      - name: Publish to Docker Repository
        uses: elgohr/Publish-Docker-Github-Action@master
        with:
          name: twwch/action-ci:${{ github.ref_name	 }}
          repository: twwch/action-ci
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
          tag_semver: true

参考代码： https://github.com/twwch/action-ci

3. 编写Dockerfile

FROM java:8-jre
ADD target/action-ci-0.0.1-SNAPSHOT.jar app.jar
RUN bash -c 'touch /app.jar'
ENTRYPOINT 9915
ENTRYPOINT ["java", "-Dfile.encoding=utf-8", "-Djava.security.edg=file:/dev/./urandom", "-Duser.timezone=Asia/Shanghai", "-Xmx128m", "-Xms64m", "-jar", "/app.jar"]

提交代码，在github上找到actions
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执行完成

docker hub里面就可以看到镜像了