runner-env

Docker image used as the environment for Forgejo Actions runners. It provides all the tools needed to build Java/Maven projects with a Node.js frontend and push Docker images.

What's included

Tool	Version / Notes
Node.js	20 (via node:20-bookworm-slim base)
npm	bundled with Node.js
Java	Temurin JDK 17 or 21 (see branches)
Maven	from Debian apt
Docker CLI	latest stable, no daemon
Git	from Debian apt
SSH client	for git push over SSH

Branches & tags

Branch	JDK	Published tag
17	17	git.midasvo.nl/midas/runner-env:17
21	21	git.midasvo.nl/midas/runner-env:21
develop	21	git.midasvo.nl/midas/runner-env:develop

Usage in Forgejo Actions

jobs:
  build:
    runs-on: your-runner-label
    steps:
      - uses: actions/checkout@v3

      - name: Build and push
        env:
          DOCKER_API_VERSION: "1.43"
        run: |
          docker build -t your-image:tag .
          docker push your-image:tag

Note: Set DOCKER_API_VERSION: "1.43" when using Docker commands. The runner mounts the host Docker socket and the host daemon may be older than the CLI bundled in this image.

Building manually

docker build -t git.midasvo.nl/midas/runner-env:17 .
docker push git.midasvo.nl/midas/runner-env:17

CI

Pushing to any branch triggers a build and push via .forgejo/workflows/build.yml. The image tag matches the branch name.

Required repository secrets:

• REGISTRY_USERNAME
• REGISTRY_PASSWORD