fixed start script

Author: wurstmeister

start-kafka.sh

@@ -26,7 +26,7 @@ if [[ -z "$KAFKA_ADVERTISED_PORT" && \
   -z "$KAFKA_LISTENERS" && \
   -z "$KAFKA_ADVERTISED_LISTENERS" && \
   -S /var/run/docker.sock ]]; then
-    KAFKA_ADVERTISED_PORT=$(docker port "$(hostname)" $KAFKA_PORT | sed -r 's/.*:(.*)/\1/g') | head -n1
+    KAFKA_ADVERTISED_PORT=$(docker port "$(hostname)" $KAFKA_PORT | sed -r 's/.*:(.*)/\1/g' | head -n1) 
     export KAFKA_ADVERTISED_PORT
 fi