Merge branch 'add-polling-app-vm' into 'develop'

Add polling app vm

See merge request !104

alpine-ssh-client/Dockerfile

@@ -36,5 +36,6 @@ RUN mkdir -p ~/.ssh && chmod 700 ~/.ssh \
                       its-lampinteg2.unl.edu,144.216.202.38 \
                       its-lampstage2.unl.edu,144.216.202.43 \
                       its-lampprod2.unl.edu,144.216.202.44 \
+                      its-lampprod3.unl.edu,144.216.202.55 \
                       its-ads-museum-reservations1.unl.edu,144.216.202.10 \
                       >> ~/.ssh/known_hosts