Fix scripts

scripts/docker_build.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 usage() {
 	cat <<EOF
 Usage:

scripts/run_bt.sh

@@ -5,6 +5,8 @@ ros_distro="jazzy"
 script_dir=$(dirname "$(readlink -f "${bash_source[0]}")")
 pids=()
 
+trap "trap - SIGTERM && kill -- -$$" SIGINT SIGTERM EXIT
+
 source "/opt/ros/${ROS_DISTRO}/setup.bash"
 source "./install/setup.bash"