Updated the docker and ansible files for setting up and building / running rasberry pi with the frank service

Still need to manually copy the new id_rsa created on the pi to knox.

docker/files/gotthard.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Reverse SSH connection
+After=network.target
+
+[Service]
+Type=simple
+User=pi
+
+ExecStart=/usr/bin/ssh -NTg -o ServerAliveInterval=60 -o ExitOnForwardFailure=yes -o ServerAliveCountMax=3 -o StrictHostKeyChecking=no -i /home/pi/.ssh/id_rsa -R {{ ssh_port }}:localhost:22 tanshu@knox.tanshu.com
+
+# Restart every >2 seconds to avoid StartLimitInterval failure
+Restart=always
+RestartSec=5s
+
+[Install]
+WantedBy=default.target