diff --git a/.gitattributes b/.gitattributes
index dd24784..dd69b56 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -61,6 +61,7 @@
 *.python     text
 *.sql        text
 **/Dockerfile text eol=lf
+**/*.Dockerfile text eol=lf
 
 
 # Archives
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d8d499d..60840f0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-ArtifactOfProjectHomePage: https://github.com/vegardit/docker-gitea-act-runner
 #
-# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions
 name: Build
 
 on:
@@ -26,10 +26,10 @@ on:
     - '.github/*.yml'
     - '.github/workflows/stale.yml'
   schedule:
-    # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
+    # https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
     - cron: '0 17 * * 3'
   workflow_dispatch:
-    # https://github.blog/changelog/2020-07-06-github-actions-manual-triggers-with-workflow_dispatch/
+    # https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#workflow_dispatch
     inputs:
       VERSION:
         type: string
@@ -41,7 +41,7 @@ defaults:
     shell: bash
 
 env:
-  DOCKER_IMAGE_REPO: ${{ github.repository_owner }}/gitea-act-runner
+  DOCKER_REPO_NAME: gitea-act-runner
   TRIVY_CACHE_DIR: ~/.trivy/cache
 
 jobs:
@@ -49,6 +49,11 @@ jobs:
   ###########################################################
   build:
   ###########################################################
+    runs-on: ubuntu-latest  # https://github.com/actions/runner-images#available-images
+    timeout-minutes: 30
+
+    permissions:
+      packages: write
 
     strategy:
       matrix:
@@ -73,9 +78,6 @@ jobs:
             GITEA_ACT_RUNNER_VERSION: nightly
       fail-fast: true
 
-    runs-on: ubuntu-latest # https://github.com/actions/runner-images#available-images
-    timeout-minutes: 30
-
     steps:
     - name: "Show: GitHub context"
       env:
@@ -91,11 +93,21 @@ jobs:
       uses: actions/checkout@v4  # https://github.com/actions/checkout
 
 
+    - name: Run the sh-checker
+      uses: luizm/action-sh-checker@master  # https://github.com/marketplace/actions/sh-checker
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        SHFMT_OPTS: --simplify --keep-padding
+      with:
+         sh_checker_comment: true
+         sh_checker_checkbashisms_enable: true
+         sh_checker_shfmt_disable: true
+
+
     - name: Check Dockerfile
       uses: hadolint/hadolint-action@v3.1.0
       with:
         dockerfile: image/Dockerfile
-        ignore: DL3008,SC1091  # https://github.com/hadolint/hadolint/wiki/DL3008
 
 
     - name: Cache trivy cache
@@ -117,22 +129,19 @@ jobs:
 
 
     - name: "Determine if docker images shall be published"
+      id: docker_push_actions
       run: |
         # ACT -> https://nektosact.com/usage/index.html#skipping-steps
         set -x
         if [[ $GITHUB_REF_NAME == 'main' && $GITHUB_EVENT_NAME != 'pull_request' && -z "$ACT" ]]; then
           echo "DOCKER_PUSH_GHCR=true" >> "$GITHUB_ENV"
+          echo "DOCKER_PUSH_GHCR=true" >> $GITHUB_OUTPUT
           if [[ -n "${{ secrets.DOCKER_HUB_USERNAME }}" ]]; then
             echo "DOCKER_PUSH=true" >> "$GITHUB_ENV"
           fi
         fi
 
 
-    - name: Install regclient
-      if: ${{ env.DOCKER_PUSH_GHCR }}
-      uses: iarekylew00t/regctl-installer@v3
-
-
     - name: Login to docker.io
       if: ${{ env.DOCKER_PUSH }}
       uses: docker/login-action@v3
@@ -147,36 +156,50 @@ jobs:
       with:
         registry: ghcr.io
         username: ${{ github.actor }}
-        password: ${{ github.token }}
+        password: ${{ secrets.GITHUB_TOKEN }}
 
 
-    - name: Build ${{ env.DOCKER_IMAGE_REPO }}:${{ env.DOCKER_IMAGE_TAG }}
+    - name: Build ${{ env.DOCKER_REPO_NAME }}:${{ env.DOCKER_IMAGE_TAG }}
       env:
+        DOCKER_BASE_IMAGE: ghcr.io/dockerhub-mirror/debian:stable-slim
+        DOCKER_IMAGE_REPO: ${{ github.repository_owner }}/${{ env.DOCKER_REPO_NAME }}
         DOCKER_IMAGE_TAG_PREFIX: ${{ matrix.DOCKER_IMAGE_TAG_PREFIX }}
         DOCKER_IMAGE_FLAVOR: ${{ matrix.DOCKER_IMAGE_FLAVOR }}
-        TRIVY_GITHUB_TOKEN: ${{ github.token }}
+        TRIVY_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
         if [[ -n "${{ inputs.VERSION }}" ]]; then
-           export GITEA_ACT_RUNNER_VERSION="${{ inputs.VERSION }}"
+          export GITEA_ACT_RUNNER_VERSION="${{ inputs.VERSION }}"
         else
-           export GITEA_ACT_RUNNER_VERSION="${{ matrix.GITEA_ACT_RUNNER_VERSION }}"
+          export GITEA_ACT_RUNNER_VERSION="${{ matrix.GITEA_ACT_RUNNER_VERSION }}"
         fi
         bash build-image.sh
 
+    outputs:
+      DOCKER_PUSH_GHCR: ${{ steps.docker_push_actions.outputs.DOCKER_PUSH_GHCR }}
 
+
+  ###########################################################
+  delete-untagged-images:
+  ###########################################################
+    runs-on: ubuntu-latest  # https://github.com/actions/runner-images#available-images
+    timeout-minutes: 5
+    needs: [build]
+    if: ${{ needs.build.outputs.DOCKER_PUSH_GHCR }}
+
+    concurrency:
+      group: ${{ github.workflow }}
+      cancel-in-progress: false
+      
+    permissions:
+      packages: write
+
+    steps:
     - name: Delete untagged images
-      uses: actions/github-script@v7
-      if: ${{ env.DOCKER_PUSH_GHCR }}
-      continue-on-error: true
+      uses: dataaxiom/ghcr-cleanup-action@v1
       with:
-        github-token: ${{ secrets.GHA_DELETE_PACKAGES }}
-        script: |
-          const imageName = /[^/]*$/.exec(process.env.DOCKER_IMAGE_REPO)[0]
-          const basePath = `/orgs/${{ github.repository_owner }}/packages/container/${imageName}/versions`
-          for (version of (await github.request(`GET ${basePath}`, { per_page: 100 })).data) {
-            if (version.metadata.container.tags.length == 0) {
-              console.log(`deleting ${version.name}...`)
-              const delResponse = await github.request(`DELETE ${basePath}/${version.id}`)
-              console.log(`status: ${delResponse.status}`)
-            }
-          }
+        package: ${{ env.DOCKER_REPO_NAME }}
+        delete-untagged: true
+        delete-partial-images: true
+        delete-ghost-images: true
+        delete-orphaned-images: true
+        validate: true
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 545e172..32d7214 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -1,4 +1,4 @@
-# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions
 name: Stale issues
 
 on:
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index c2934ee..bca16db 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -60,7 +60,7 @@ representative at an online or offline event.
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
 reported to the community leaders responsible for enforcement at
-https://vegardit.com/about/legal/.
+https://vegardit.com/en/legal/.
 All complaints will be reviewed and investigated promptly and fairly.
 
 All community leaders are obligated to respect the privacy and security of the
diff --git a/README.md b/README.md
index 38a0fad..d798064 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 ## <a name="what-is-it"></a>What is it?
 
-`debian:stable-slim` based Docker image containing [Gitea](https://gitea.com)'s [act_runner](https://gitea.com/gitea/act_runner/)
+Multi-arch Docker image based on `debian:stable-slim` containing [Gitea](https://gitea.com)'s [act_runner](https://gitea.com/gitea/act_runner/)
 
 #### Why not using Alpine Linux?
 - musl-libc - Alpine's Greatest Weakness https://www.linkedin.com/pulse/musl-libc-alpines-greatest-weakness-rogan-lynch
diff --git a/build-image.sh b/build-image.sh
index 4fb4e99..8778b4a 100644
--- a/build-image.sh
+++ b/build-image.sh
@@ -6,7 +6,7 @@
 # SPDX-ArtifactOfProjectHomePage: https://github.com/vegardit/docker-gitea-act-runner
 
 function curl() {
-  command curl -sSfL --connect-timeout 10 --max-time 30 --retry 3 --retry-all-errors "$@"
+   command curl -sSfL --connect-timeout 10 --max-time 30 --retry 3 --retry-all-errors "$@"
 }
 
 shared_lib="$(dirname "${BASH_SOURCE[0]}")/.shared"
@@ -16,20 +16,10 @@ source "$shared_lib/lib/build-image-init.sh"
 
 
 #################################################
-# check prereqs
-#################################################
-
-if [[ "${DOCKER_PUSH:-}" == "true" ]]; then
-  if ! hash regctl &>/dev/null; then
-    log ERROR "regctl (aka regclient) command line tool is misssing!"
-  fi
-fi
-
-
-#################################################
-# specify target docker registry/repo
+# specify target image repo/tag
 #################################################
 gitea_act_runner_version=${GITEA_ACT_RUNNER_VERSION:-latest}
+base_image_name=${DOCKER_BASE_IMAGE:-debian:stable-slim}
 image_repo=${DOCKER_IMAGE_REPO:-vegardit/gitea-act-runner}
 
 
@@ -37,13 +27,24 @@ image_repo=${DOCKER_IMAGE_REPO:-vegardit/gitea-act-runner}
 # resolve gitea act runner version
 #################################################
 case $gitea_act_runner_version in
-  latest) gitea_act_runner_effective_version=$(curl https://gitea.com/gitea/act_runner/releases.rss | grep -oP "releases/tag/v\K\d\.\d\.\d\d?" | head -n 1)
-          ;;
-  *)      gitea_act_runner_effective_version=$gitea_act_runner_version
-          ;;
+   latest) gitea_act_runner_effective_version=$(curl https://gitea.com/gitea/act_runner/releases.rss | grep -oP "releases/tag/v\K\d\.\d\.\d\d?" | head -n 1) ;;
+   *)      gitea_act_runner_effective_version=$gitea_act_runner_version ;;
 esac
-image_name=$image_repo:${DOCKER_IMAGE_TAG_PREFIX:-}$gitea_act_runner_version
-image_name2=$image_repo:${DOCKER_IMAGE_TAG_PREFIX:-}$gitea_act_runner_effective_version
+
+
+#################################################
+# calculate tags
+#################################################
+declare -a tags=()
+tags+=("$image_repo:${DOCKER_IMAGE_TAG_PREFIX:-}$gitea_act_runner_version")
+tags+=("$image_repo:${DOCKER_IMAGE_TAG_PREFIX:-}$gitea_act_runner_effective_version")
+
+tag_args=()
+for t in "${tags[@]}"; do
+  tag_args+=( --tag "$t" )
+done
+
+image_name=${tags[0]}
 
 
 #################################################
@@ -51,17 +52,19 @@ image_name2=$image_repo:${DOCKER_IMAGE_TAG_PREFIX:-}$gitea_act_runner_effective_
 #################################################
 log INFO "Building docker image [$image_name]..."
 if [[ $OSTYPE == "cygwin" || $OSTYPE == "msys" ]]; then
-  project_root=$(cygpath -w "$project_root")
+   project_root=$(cygpath -w "$project_root")
 fi
 
 # https://github.com/docker/buildx/#building-multi-platform-images
 set -x
 
 docker --version
-docker run --privileged --rm tonistiigi/binfmt --install all
-export DOCKER_BUILD_KIT=1
+export DOCKER_BUILDKIT=1
 export DOCKER_CLI_EXPERIMENTAL=1 # prevents "docker: 'buildx' is not a docker command."
 
+# Register QEMU emulators for all architectures so Docker can run and build multi-arch images
+docker run --privileged --rm ghcr.io/dockerhub-mirror/tonistiigi__binfmt --install all
+
 # https://docs.docker.com/build/buildkit/configure/#resource-limiting
 echo "
 [worker.oci]
@@ -70,43 +73,35 @@ echo "
 
 docker buildx version # ensures buildx is enabled
 docker buildx create --config /etc/buildkitd.toml --use # prevents: error: multiple platforms feature is currently not supported for docker driver. Please switch to a different driver (eg. "docker buildx create --use")
+trap 'docker buildx stop' EXIT
 # shellcheck disable=SC2154,SC2046  # base_layer_cache_key is referenced but not assigned / Quote this to prevent word splitting
 docker buildx build "$project_root" \
-  --file "image/Dockerfile" \
-  --progress=plain \
-  --pull \
-  --build-arg INSTALL_SUPPORT_TOOLS="${INSTALL_SUPPORT_TOOLS:-0}" \
-  `# using the current date as value for BASE_LAYER_CACHE_KEY, i.e. the base layer cache (that holds system packages with security updates) will be invalidate once per day` \
-  --build-arg BASE_LAYER_CACHE_KEY="$base_layer_cache_key" \
-  --build-arg BUILD_DATE="$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
-  --build-arg GIT_BRANCH="${GIT_BRANCH:-$(git rev-parse --abbrev-ref HEAD)}" \
-  --build-arg GIT_COMMIT_DATE="$(date -d "@$(git log -1 --format='%at')" --utc +'%Y-%m-%d %H:%M:%S UTC')" \
-  --build-arg GIT_COMMIT_HASH="$(git rev-parse --short HEAD)" \
-  --build-arg GIT_REPO_URL="$(git config --get remote.origin.url)" \
-  --build-arg GITEA_ACT_RUNNER_VERSION="$gitea_act_runner_effective_version" \
-  --build-arg FLAVOR="$DOCKER_IMAGE_FLAVOR" \
-  $(if [[ "${ACT:-}" == "true" || "${DOCKER_PUSH:-}" != "true" ]]; then \
-    echo -n "--load --output type=docker"; \
-  else \
-    echo -n "--platform linux/amd64,linux/arm64,linux/arm/v7"; \
-  fi) \
-  -t "$image_name" \
-  -t "$image_name2" \
-  $(if [[ "${DOCKER_PUSH:-}" == "true" ]]; then echo -n "--push"; fi) \
-  "$@"
-docker buildx stop
+   --file "image/Dockerfile" \
+   --progress=plain \
+   --pull \
+   --build-arg INSTALL_SUPPORT_TOOLS="${INSTALL_SUPPORT_TOOLS:-0}" \
+   `# using the current date as value for BASE_LAYER_CACHE_KEY, i.e. the base layer cache (that holds system packages with security updates) will be invalidate once per day` \
+   --build-arg BASE_LAYER_CACHE_KEY="$base_layer_cache_key" \
+   --build-arg BASE_IMAGE="$base_image_name" \
+   --build-arg BUILD_DATE="$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
+   --build-arg GIT_BRANCH="${GIT_BRANCH:-$(git rev-parse --abbrev-ref HEAD)}" \
+   --build-arg GIT_COMMIT_DATE="$(date -d "@$(git log -1 --format='%at')" --utc +'%Y-%m-%d %H:%M:%S UTC')" \
+   --build-arg GIT_COMMIT_HASH="$(git rev-parse --short HEAD)" \
+   --build-arg GIT_REPO_URL="$(git config --get remote.origin.url)" \
+   --build-arg GITEA_ACT_RUNNER_VERSION="$gitea_act_runner_effective_version" \
+   --build-arg FLAVOR="$DOCKER_IMAGE_FLAVOR" \
+   $(if [[ ${ACT:-} == "true" || ${DOCKER_PUSH:-} != "true" ]]; then \
+      echo -n "--load --output type=docker"; \
+   else \
+      echo -n "--platform linux/amd64,linux/arm64,linux/arm/v7"; \
+   fi) \
+   "${tag_args[@]}" \
+   $(if [[ ${DOCKER_PUSH:-} == "true" ]]; then echo -n "--push"; fi) \
+   "$@"
 set +x
 
-if [[ "${DOCKER_PUSH:-}" == "true" ]]; then
-  docker image pull "$image_name"
-fi
-
-#################################################
-# push image to ghcr.io
-#################################################
-if [[ "${DOCKER_PUSH_GHCR:-}" == "true" ]]; then
-  (set -x; regctl image copy "$image_name" "ghcr.io/$image_name")
-  (set -x; regctl image copy "$image_name2" "ghcr.io/$image_name2")
+if [[ ${DOCKER_PUSH:-} == "true" ]]; then
+   docker image pull "$image_name"
 fi
 
 
@@ -123,6 +118,22 @@ echo
 # perform security audit
 #################################################
 # TODO see https://gitea.com/gitea/act_runner/issues/513
-if [[ "${DOCKER_AUDIT_IMAGE:-1}" == 1 && "$GITEA_ACT_RUNNER_VERSION" == "nightly" ]]; then
-  bash "$shared_lib/cmd/audit-image.sh" "$image_name"
+if [[ ${DOCKER_AUDIT_IMAGE:-1} == "1" && $GITEA_ACT_RUNNER_VERSION == "nightly" ]]; then
+   bash "$shared_lib/cmd/audit-image.sh" "$image_name"
+fi
+
+
+#################################################
+# push image to ghcr.io
+#################################################
+if [[ ${DOCKER_PUSH_GHCR:-} == "true" ]]; then
+   for tag in "${tags[@]}"; do
+      set -x
+      docker run --rm \
+         -u "$(id -u):$(id -g)" -e HOME -v "$HOME:$HOME" \
+         -v /etc/docker/certs.d:/etc/docker/certs.d:ro \
+         ghcr.io/regclient/regctl:latest \
+         image copy "$tag" "ghcr.io/$tag"
+      set +x
+   done
 fi
diff --git a/image/Dockerfile b/image/Dockerfile
index 949babf..b6d0b58 100644
--- a/image/Dockerfile
+++ b/image/Dockerfile
@@ -1,4 +1,4 @@
-#syntax=docker/dockerfile:1.4
+#syntax=docker/dockerfile:1
 # see https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/syntax.md#user-content-syntax
 # see https://docs.docker.com/build/dockerfile/frontend/
 # see https://docs.docker.com/engine/reference/builder/#syntax
@@ -7,13 +7,18 @@
 # SPDX-FileContributor: Sebastian Thomschke
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-ArtifactOfProjectHomePage: https://github.com/vegardit/docker-gitea-act-runner
-#
-# https://hub.docker.com/_/debian?tab=tags&name=stable-slim
 
-FROM debian:stable-slim
+# https://hub.docker.com/_/debian/tags?name=stable-slim
+ARG BASE_IMAGE=debian:stable-slim
+
+# https://github.com/hadolint/hadolint/wiki/DL3006 Always tag the version of an image explicitly
+# hadolint ignore=DL3006
+FROM ${BASE_IMAGE}
 
 LABEL maintainer="Vegard IT GmbH (vegardit.com)"
 
+# https://github.com/hadolint/hadolint/wiki/DL3002 Last USER should not be root
+# hadolint ignore=DL3002
 USER root
 
 SHELL ["/bin/bash", "-euo", "pipefail", "-c"]
@@ -31,8 +36,9 @@ ARG BASE_LAYER_CACHE_KEY
 ARG FLAVOR
 ARG GITEA_ACT_RUNNER_VERSION
 
+# https://github.com/hadolint/hadolint/wiki/DL3008 Pin versions
+# hadolint ignore=DL3008
 RUN --mount=type=bind,source=.shared,target=/mnt/shared <<EOF
-
   /mnt/shared/cmd/debian-install-os-updates.sh
   /mnt/shared/cmd/debian-install-support-tools.sh
 
@@ -52,7 +58,7 @@ RUN --mount=type=bind,source=.shared,target=/mnt/shared <<EOF
   }
 
   arch=$(dpkg --print-architecture)
-  case $arch in
+  case "$arch" in
     armhf)       upx_arch=arm;   gitea_arch=arm-7 ;;
     amd64|arm64) upx_arch=$arch; gitea_arch=$arch ;;
     *) echo "Unsupported arch: $arch"; exit 1;;
@@ -69,7 +75,7 @@ RUN --mount=type=bind,source=.shared,target=/mnt/shared <<EOF
     echo "#################################################"
     apt-get install --no-install-recommends -y xz-utils
     mkdir /opt/upx
-    upx_download_url=$(curl "https://api.github.com/repos/upx/upx/releases/latest" | grep browser_download_url | grep ${upx_arch}_linux.tar.xz | cut "-d\"" -f4)
+    upx_download_url=$(curl "https://api.github.com/repos/upx/upx/releases/latest" | grep browser_download_url | grep "${upx_arch}_linux.tar.xz" | cut "-d\"" -f4)
     echo "Downloading [$upx_download_url]..."
     curl "$upx_download_url" | tar Jxv -C /opt/upx --strip-components=1
     /opt/upx/upx --version
@@ -81,9 +87,9 @@ RUN --mount=type=bind,source=.shared,target=/mnt/shared <<EOF
   echo "Downloading Gitea act runner..."
   echo "#################################################"
   if [[ $GITEA_ACT_RUNNER_VERSION == "nightly" ]]; then
-    act_runner_download_url=https://dl.gitea.com/act_runner/nightly/act_runner-${GITEA_ACT_RUNNER_VERSION}-linux-${gitea_arch}
+    act_runner_download_url="https://dl.gitea.com/act_runner/nightly/act_runner-${GITEA_ACT_RUNNER_VERSION}-linux-${gitea_arch}"
   else
-    act_runner_download_url=https://gitea.com/gitea/act_runner/releases/download/v${GITEA_ACT_RUNNER_VERSION}/act_runner-${GITEA_ACT_RUNNER_VERSION}-linux-${gitea_arch}
+    act_runner_download_url="https://gitea.com/gitea/act_runner/releases/download/v${GITEA_ACT_RUNNER_VERSION}/act_runner-${GITEA_ACT_RUNNER_VERSION}-linux-${gitea_arch}"
   fi
   echo "Downloading [$act_runner_download_url]..."
   curl "$act_runner_download_url" -o /usr/local/bin/act_runner
@@ -111,9 +117,11 @@ RUN --mount=type=bind,source=.shared,target=/mnt/shared <<EOF
     install -m 0755 -d /etc/apt/keyrings
     curl "https://download.docker.com/linux/debian/gpg" | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
     chmod a+r /etc/apt/keyrings/docker.gpg
-    echo \
-      "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
-      "$(source /etc/os-release && echo "$VERSION_CODENAME")" stable" > /etc/apt/sources.list.d/docker.list
+
+    ARCH="$(dpkg --print-architecture)"
+    # shellcheck disable=SC1091 # Not following: File not included in mock
+    OS_CODENAME="$(source /etc/os-release && echo "$VERSION_CODENAME")"
+    echo "deb [arch=$ARCH signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian $OS_CODENAME stable" > /etc/apt/sources.list.d/docker.list
     apt-get update
     (set -x; apt-get install --no-install-recommends -y docker-ce containerd.io fuse-overlayfs)
     apt-get remove -y gnupg
diff --git a/image/run_runner.sh b/image/run_runner.sh
index 038949b..a897738 100644
--- a/image/run_runner.sh
+++ b/image/run_runner.sh
@@ -4,7 +4,6 @@
 # SPDX-FileContributor: Sebastian Thomschke
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-ArtifactOfProjectHomePage: https://github.com/vegardit/docker-gitea-act-runner
-#
 
 # shellcheck disable=SC1091  # Not following: /opt/bash-init.sh was not specified as input
 source /opt/bash-init.sh