feat: enhance task runner with task status updates and process command execution

- Added a task status update to 'processing' at the start of the Run method in runner.go, improving task tracking.
- Removed redundant task status update from the end of the Run method to streamline the execution flow.
- Updated command execution in process.go to use 'bash' instead of 'sh' for better compatibility across environments.

core/task/handler/runner.go

@@ -148,6 +148,11 @@ func (r *Runner) Run() (err error) {
 	// log task started
 	r.Infof("task[%s] started", r.tid.Hex())
 
+	// update task status (processing)
+	if err := r.updateTask(constants.TaskStatusRunning, nil); err != nil {
+		return err
+	}
+
 	// configure working directory
 	r.configureCwd()
 
@@ -184,11 +189,6 @@ func (r *Runner) Run() (err error) {
 	r.pid = r.cmd.Process.Pid
 	r.t.Pid = r.pid
 
-	// update task status (processing)
-	if err := r.updateTask(constants.TaskStatusRunning, nil); err != nil {
-		return err
-	}
-
 	// start health check
 	go r.startHealthCheck()
 

core/utils/process.go

@@ -16,7 +16,7 @@ func BuildCmd(cmdStr string) (cmd *exec.Cmd, err error) {
 	if runtime.GOOS == "windows" {
 		return exec.Command("cmd", "/C", cmdStr), nil
 	}
-	return exec.Command("sh", "-c", cmdStr), nil
+	return exec.Command("bash", "-c", cmdStr), nil
 }
 
 func ProcessIdExists(pid int) (exists bool) {