ubuntu 20.04 cronjob at restart not working

I have a bash file that just stops the existing docker container. The script works fine when I run it manually but it is not working on my crontab. I need to execute the bash script when I start my pc.

Crontab:(not working on start)

@reboot /var/www/airflow/stop_airflow.sh

Bash content (stop_airflow.sh)

#!/bin/bash
cd /var/www/airflow && docker-compose stop

Terminal Execution:

bash /var/www/airflow/stop_airflow.sh

Outputs:

Stopping airflow_airflow-worker_1    ... done 
Stopping airflow_flower_1            ... done 
Stopping airflow_airflow-webserver_1 ... done 
Stopping airflow_airflow-scheduler_1 ... done 
Stopping airflow_redis_1             ... done 
Stopping airflow_postgres_1          ... done

Jobs run through cron aren't run in the same runtime environment that you have on your desktop. None of your PATH changes, or other environment variable settings from ~/.bashrc are automatically propagated to your cron job. For example, there's no $DISPLAY, so GUI programs need special treatment (read man xhost). In your case, your script is probably looking for, and not finding docker-compose in your $PATH.

One can set environment variables for all one's cron jobs in the crontab file Read man 5 crontab.

Look at the results of echo "=== id ===";id;echo "=== set ===";set;echo "=== env ===";env | sort;echo "=== alias ===";alias in each of your environments.