build(dockerfile): add Dockerfile - including python3 and mkdocs

Author: mistlworks

Dockerfile

@@ -0,0 +1,27 @@
+FROM jenkins/inbound-agent:alpine as jnlp
+
+FROM jenkins/agent:latest-jdk11
+
+ARG version
+LABEL Description="This is a base image, which allows connecting Jenkins agents via JNLP protocols" Vendor="Jenkins project" Version="$version"
+
+ARG user=jenkins
+
+USER root
+
+COPY --from=jnlp /usr/local/bin/jenkins-agent /usr/local/bin/jenkins-agent
+
+RUN chmod +x /usr/local/bin/jenkins-agent && \
+    ln -s /usr/local/bin/jenkins-agent /usr/local/bin/jenkins-slave
+
+RUN apt-get update && apt-get install -y \
+    rsync \
+    python3 \
+    python3-pip \
+    python3-venv
+
+RUN pip3 install mkdocs
+
+USER ${user}
+
+ENTRYPOINT ["/usr/local/bin/jenkins-agent"]