fix: invalid INTERNAL_IP environment value

New IP route output appends UID to the result, causing the value to be set to that instead of the IP. Fix it by ignoring the last two appended UID results

cassandra/entrypoint.sh

@@ -5,7 +5,7 @@ TZ=${TZ:-UTC}
 export TZ
 
 # Set environment variable that holds the Internal Docker IP
-INTERNAL_IP=$(ip route get 1 | awk '{print $NF;exit}')
+INTERNAL_IP=$(ip route get 1 | awk '{print $(NF-2);exit}')
 export INTERNAL_IP
 
 # Switch to the container's working directory