get connected to temporal

ext/central-controller-docker/main.sh

@@ -100,6 +100,13 @@ else
     done
 fi
 
+echo "Waiting for temporal"
+while ! nc -z ${ZT_TEMPORAL_HOST} ${ZTC_TEMPORAL_PORT}; do
+    echo "waiting...";
+    sleep 1;
+done
+echo "Temporal is up"
+
 export GLIBCXX_FORCE_NEW=1
 export GLIBCPP_FORCE_NEW=1
 export LD_PRELOAD="/usr/lib/x86_64-linux-gnu/libjemalloc.so.2"