Add IPs to known_hosts

Update known_hosts file to include IPs and hash hosts/IPs for security

alpine-ssh-client/Dockerfile

@@ -16,13 +16,13 @@ RUN apk add --no-cache openssh-client ca-certificates rsync
 
 RUN mkdir -p ~/.ssh && chmod 700 ~/.ssh \
     && touch ~/.ssh/known_hosts && chmod 644 ~/.ssh/known_hosts \
-    && ssh-keyscan its-lampinteg1.unl.edu\
-                   its-lampstage1.unl.edu \
-                   its-lampprod1.unl.edu \
-                   its-linprod2.unl.edu \
-                   y1cap.unl.edu \
-                   passel2.unl.edu \
-                   buros-apps.unl.edu \
-                   its-lrc2.unl.edu \
-                   its-ads-saml-proxy.unl.edu \
-                   >> ~/.ssh/known_hosts
+    && ssh-keyscan -H its-lampinteg1.unl.edu,129.93.168.14 \
+                      its-lampstage1.unl.edu,129.93.168.50 \
+                      its-lampprod1.unl.edu,129.93.168.36 \
+                      its-linprod2.unl.edu,129.93.169.114 \
+                      y1cap.unl.edu,129.93.169.153 \
+                      passel2.unl.edu,129.93.168.221 \
+                      buros-apps.unl.edu,129.93.168.136 \
+                      its-lrc2.unl.edu,129.93.168.197 \
+                      its-ads-saml-proxy.unl.edu,129.93.168.174 \
+                      >> ~/.ssh/known_hosts