first commit

.github/workflows/docker-publish.yml

+name: Docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  schedule:
+    - cron: '31 0 * * *'
+  push:
+    branches: [ main ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.gitlab-ci.yml

+image: registry-gitlab.pasteur.fr/dsi-tools/docker-images/docker:latest
+
+services:
+    - registry-gitlab.pasteur.fr/dsi-tools/docker-images/docker:dind
+stages:
+    - build
+
+build:
+  stage: build
+  script:
+    - docker login -u gitlab-ci-token -p "$CI_BUILD_TOKEN" registry-gitlab.pasteur.fr
+    - export  MY_TIME=`date +"%F-%H%M"`
+    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_BUILD_REF_NAME" -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA" -t "$CI_REGISTRY_IMAGE:latest" -t "$CI_REGISTRY_IMAGE:$MY_TIME" .
+    - docker push "$CI_REGISTRY_IMAGE"

Dockerfile

+FROM archlinux
+MAINTAINER Tru Huynh <tru@pasteur.fr>
+
+RUN pacman -Syu
+RUN date +"%Y-%m-%d-%H%M" > /last_update

README.md

+# building a archlinux docker image for CI
+
+Tru <tru@pasteur.fr>
+
+(toy) docker image produced available at `registry-gitlab.pasteur.fr/tru/docker-archlinux-ci:latest`
+
+github mirror created at https://github.com/truatpasteurdotfr/docker-archlinux-ci
+
+github actions is now building docker image available at `ghcr.io/truatpasteurdotfr/docker-archlinux-ci:main`
+(but within the "free" plan limits listed at https://github.com/features/packages#pricing)