fix(docker): no foreground task in docker

start-cluster.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Alternatively, start TaskManager in the foreground if necessary
+$FLINK_HOME/bin/taskmanager.sh start
+
+# Start JobManager in the foreground
+$FLINK_HOME/bin/jobmanager.sh start-foreground
+
+# If you want to submit a job and still keep the cluster alive, use this:
+if [[ -n "$FLINK_JOB" ]]; then
+  echo "Running Flink job: $FLINK_JOB"
+  $FLINK_HOME/bin/flink run -d $FLINK_JOB
+fi
+
+# Keep the container running
+tail -f /dev/null  # This will prevent the container from exiting