Added Dockerfile for Slave Image

Dockerfile

+FROM jenkinsci/jnlp-slave
+
+USER root
+RUN apt-get update && \
+    apt-get -y install apt-transport-https \
+      ca-certificates \
+      curl \
+      gnupg2 \
+      software-properties-common && \
+    curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg > /tmp/dkey; apt-key add /tmp/dkey && \
+    add-apt-repository \
+      "deb [arch=amd64] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
+      $(lsb_release -cs) \
+      stable" && \
+   apt-get update && \
+   apt-get -y install docker-ce
\ No newline at end of file

values.yaml

+master:
+  extraPorts:
+  - name: ssh
+    port: 2222
+    externalPort: 22
+    protocol: TCP
+  - name: slvlistener-jen
+    port: 50000
+    externalPort: 50000
+    protocol: TCP
+
+agent:
+  enabled: true
+  image: fabiuse/jenkins-with-docker
+  tag: latest
+  alwaysPullImage: true
+  privileged: true
+  volumes:
+    - type: HostPath
+      hostPath: /var/run/docker.sock
+      mountPath: /var/run/docker.sock
+
+networkPolicy:
+  enabled: true
\ No newline at end of file