Added Network Automation container

docker/network_automation/Dockerfile

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+# docker base image for Netmiko, NAPALM, Pyntc, and Ansible
+
+FROM ubuntu:xenial
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get -y --no-install-recommends install \
+    telnet curl openssh-client nano vim-tiny iputils-ping python build-essential libssl-dev libffi-de \
+    python-pip ansible \
+    && rm -rf /var/lib/apt/lists/* \
+    && pip install cryptography netmiko napalm pyntc
+
+VOLUME [ "/root" ]
+CMD [ "sh", "-c", "cd; exec bash -i" ]
+

docker/network_automation/README.md

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+# Ubuntu - Network Automation Toolbox
+
+This appliance contains the following network automation tools:
+
+- Netmiko
+- NAPALM
+- Pyntc
+- Ansible
+
+The /root folder is mount by default
+
+## Build and publish the Images
+
+First the base image has to be created:
+
+```
+docker build -t gns3/network_autmation:latest .
+docker push gns3/network_autmation:latest    (optional)
+```