feat: enable arm64 platform

.forgejo/workflows/build.yml

@@ -45,6 +45,8 @@ jobs:
           HOSTNAME="${SERVER_URL#https://}"
           echo "Hostname: HOSTNAME"
           echo "DOCKER_REGISTRY_HOST=$HOSTNAME" >> "$GITHUB_ENV"
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       - name: Login to Forgejo Registry
         uses: docker/login-action@v3
         with:
@@ -54,6 +56,7 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
+          platforms: linux/amd64,linux/arm64
           context: ./images/${{ matrix.images.name }}/${{ matrix.images.tag }}
           push: true
           tags: ${{ env.DOCKER_REGISTRY_HOST }}/${{ github.repository_owner }}/${{ matrix.images.name }}:${{ matrix.images.tag }}

README.md

@@ -8,4 +8,7 @@ https://git.martin-riedl.de/ci/-/packages/container/ubuntu/24.04
 
 - ca-certificates
 - curl
+- docker-ce-cli
+- docker-buildx-plugin
+- git
 - nodejs 22

images/ubuntu/24.04/Dockerfile

@@ -2,10 +2,27 @@ FROM ubuntu:24.04
 
 RUN apt-get update && apt-get upgrade -y && rm -rf /var/lib/apt/lists/*
 
+# install basis tools
+RUN apt-get update &&  \
+    apt-get install -y --no-install-recommends curl ca-certificates git && \
+    rm -rf /var/lib/apt/lists/*
+
 # install nodejs
-RUN apt-get update && apt-get install -y --no-install-recommends curl ca-certificates && \
+RUN curl -fsSL https://deb.nodesource.com/setup_22.x -o nodesource_setup.sh && \
-    curl -fsSL https://deb.nodesource.com/setup_22.x -o nodesource_setup.sh && \
     bash nodesource_setup.sh && \
     apt-get install -y --no-install-recommends nodejs && \
     rm -rf /var/lib/apt/lists/* && \
     node -v
+
+# install docker client
+# https://docs.docker.com/engine/install/ubuntu/#install-using-the-repository
+RUN install -m 0755 -d /etc/apt/keyrings && \
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc && \
+    chmod a+r /etc/apt/keyrings/docker.asc && \
+    echo \
+      "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
+      $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
+      tee /etc/apt/sources.list.d/docker.list > /dev/null && \
+    apt-get update && apt-get install -y --no-install-recommends docker-ce-cli docker-buildx-plugin && \
+    rm -rf /var/lib/apt/lists/* && \
+    docker -v