support Python 3.12

docker/image/Dockerfile

@@ -1,3 +1,7 @@
+#syntax=docker/dockerfile:1.4
+# see https://docs.docker.com/build/dockerfile/frontend/#dockerfile-frontend
+# see https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/reference.md#syntax
+# see https://docs.docker.com/engine/reference/builder/#syntax
 #
 # Copyright (C) 2022 Sebastian Thomschke and contributors
 # SPDX-License-Identifier: AGPL-3.0-or-later
@@ -8,45 +12,59 @@
 ######################
 FROM debian:stable-slim as runtime-base-image
 
-LABEL maintainer="Sebastian Thomschke"
-
 ARG DEBIAN_FRONTEND=noninteractive
 ARG LC_ALL=C
 
-RUN set -eu \
- #
- && apt-get update -y \
- && echo "#################################################" \
- && echo "Install Chromium + Driver..." \
- && echo "#################################################" \
- && apt-get install --no-install-recommends -y chromium chromium-driver \
- #
- && rm -rf \
+SHELL ["/bin/bash", "-euo", "pipefail", "-c"]
+
+RUN <<EOF
+
+  apt-get update
+
+  echo "#################################################"
+  echo "Install Chromium + Driver..."
+  echo "#################################################"
+  apt-get install --no-install-recommends -y chromium chromium-driver
+
+  apt-get clean autoclean
+  apt-get autoremove --purge -y
+  rm -rf \
     /var/cache/{apt,debconf} \
     /var/lib/apt/lists/* \
     /var/log/{apt,alternatives.log,bootstrap.log,dpkg.log} \
     /tmp/* /var/tmp/*
 
+EOF
 
 ######################
 # build image
 ######################
 
-# https://hub.docker.com/_/python?tab=tags&name=3-slim
-FROM python:3-slim AS build-image
+# https://hub.docker.com/_/python/tags?name=3-slim
+FROM python:3.12-slim AS build-image
 
-RUN apt-get update \
- # install required libraries
- && apt-get install --no-install-recommends -y \
+ARG DEBIAN_FRONTEND=noninteractive
+ARG LC_ALL=C
+
+SHELL ["/bin/bash", "-euo", "pipefail", "-c"]
+
+RUN <<EOF
+
+  apt-get update
+
+  # install required libraries
+  apt-get install --no-install-recommends -y \
     binutils `# required by pyinstaller` \
     build-essential `# required by transitive dependency "wrapt"` \
     git `# required by pdm to generate app version` \
- #
- # upgrade pip
- && python -m pip install --upgrade pip \
- #
- # install pdm
- && pip install pdm
+
+  # upgrade pip
+  python -m pip install --upgrade pip \
+
+  # install pdm
+  pip install pdm
+
+EOF
 
 ENV PATH="/opt/upx:${PATH}"
 
@@ -54,12 +72,16 @@ COPY kleinanzeigen_bot /opt/app/kleinanzeigen_bot
 COPY .git /opt/app/.git
 COPY README.md pdm.lock pyinstaller.spec pyproject.toml /opt/app/
 
-RUN cd /opt/app \
- && ls -la . \
- && pdm install -v \
- && ls -la kleinanzeigen_bot \
- && pdm run compile \
- && ls -l dist
+RUN <<EOF
+
+  cd /opt/app
+  ls -la .
+  pdm install -v
+  ls -la kleinanzeigen_bot
+  pdm run compile
+  ls -l dist
+
+EOF
 
 RUN /opt/app/dist/kleinanzeigen-bot --help
 
@@ -76,10 +98,16 @@ ARG GIT_COMMIT_DATE
 ARG GIT_REPO_URL
 
 LABEL \
+  maintainer="Sebastian Thomschke" \
   org.label-schema.schema-version="1.0" \
   org.label-schema.build-date=$BUILD_DATE \
   org.label-schema.vcs-ref=$GIT_COMMIT_HASH \
-  org.label-schema.vcs-url=$GIT_REPO_URL
+  org.label-schema.vcs-url=$GIT_REPO_URL \
+  org.opencontainers.image.authors="Sebastian Thomschke" \
+  org.opencontainers.image.vendor="Sebastian Thomschke" \
+  org.opencontainers.image.licenses="AGPL-3.0" \
+  org.opencontainers.image.title="kleinanzeigen-bot" \
+  org.opencontainers.image.description="CLI application to ease publishing of ads to kleinanzeigen.de"
 
 # https://stackoverflow.com/a/59812588/5116073
 ENV PYTHONUNBUFFERED=1