Development: Fix docker command in Jenkins development setup (#7585)

docker/jenkins.yml

@@ -15,7 +15,6 @@ services:
             - ./jenkins/master-key-only-for-testing.key:/var/jenkins_home/master.key # Preset master key to use pre-generated secrets
             - ./jenkins/jenkins-casc-config.yml:/usr/share/jenkins/ref/jenkins-casc-config.yml:ro
             - /var/run/docker.sock:/var/run/docker.sock
-            - /usr/bin/docker:/usr/bin/docker:ro
         ports:
             - "8082:8080"
         # expose the port to make it reachable docker internally even if the external port mapping changes

docker/jenkins/Dockerfile

@@ -12,4 +12,16 @@ RUN jenkins-plugin-cli --plugin-file /usr/share/jenkins/ref/plugins.yml
 # (Uncomment this line if you're using jenknis-casc-config.yml for auto-configuration)
 # ENV JAVA_OPTS -Djenkins.install.runSetupWizard=false
 
+# setup docker
+RUN apt-get update -y \
+    && apt-get install -qqy apt-transport-https ca-certificates curl gnupg2 software-properties-common
+RUN curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
+RUN add-apt-repository \
+   "deb [arch=$(dpkg --print-architecture)] https://download.docker.com/linux/debian \
+   $(lsb_release -cs) \
+   stable"
+RUN apt-get update -y \
+    && apt-get -y install docker-ce && rm -rf /var/apt/cache/*
+RUN usermod -aG docker jenkins
+
 USER jenkins