Reduce docker image size

docker/Dockerfile

@@ -30,9 +30,9 @@ LABEL maintainer="me@tcardonne.fr" \
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
  apt-get install -y \
  curl \
+ unzip \
  apt-transport-https \
  ca-certificates \
- curl \
  software-properties-common \
  sudo \
  supervisor \
@@ -42,25 +42,32 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
  zlib1g-dev \
  gettext \
  liblttng-ust0 \
- libcurl4-openssl-dev
+ libcurl4-openssl-dev && \
+ rm -rf /var/lib/apt/lists/* && \
+ apt-get clean
 
 COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 RUN chmod 644 /etc/supervisor/conf.d/supervisord.conf
 
 # Install Docker CLI
-RUN curl -fsSL https://get.docker.com -o get-docker.sh && sh get-docker.sh
+RUN curl -fsSL https://get.docker.com -o- | sh && \
+ rm -rf /var/lib/apt/lists/* && \
+ apt-get clean
 
 # Install Docker-Compose
-RUN curl -L "https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && \
+RUN curl -L -o /usr/local/bin/docker-compose \
+ "https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" && \
  chmod +x /usr/local/bin/docker-compose
 
 RUN cd /tmp && \
- curl -sL https://www.kernel.org/pub/software/scm/git/git-${GIT_VERSION}.tar.gz -o git.tgz && \
+ curl -sL -o git.tgz \
+ https://www.kernel.org/pub/software/scm/git/git-${GIT_VERSION}.tar.gz && \
  tar zxf git.tgz && \
  cd git-${GIT_VERSION} && \
  ./configure --prefix=/usr && \
- make && \
- make install
+ make && \
+ make install && \
+ rm -rf /tmp/*
 
 RUN mkdir -p /home/runner ${AGENT_TOOLSDIRECTORY}
 
@@ -73,11 +80,9 @@ RUN GH_RUNNER_VERSION=${GH_RUNNER_VERSION:-$(curl --silent "https://api.github.c
  && ./bin/installdependencies.sh \
  && chown -R root: /home/runner \
  && rm -rf /var/lib/apt/lists/* \
- && rm -rf /tmp/* \
  && apt-get clean
 
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]
 CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]
-