added Dockerfile

Dockerfile

@@ -0,0 +1,12 @@
+FROM jenkins/jenkins:latest
+USER root
+RUN apt-get update && apt-get install -y lsb-release
+RUN curl -fsSLo /usr/share/keyrings/docker-archive-keyring.asc \
+  https://download.docker.com/linux/debian/gpg
+RUN echo "deb [arch=$(dpkg --print-architecture) \
+  signed-by=/usr/share/keyrings/docker-archive-keyring.asc] \
+  https://download.docker.com/linux/debian \
+  $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list
+RUN apt-get update && apt-get install -y docker-ce-cli
+USER jenkins
+RUN jenkins-plugin-cli --plugins "blueocean docker-workflow"