Then stop the adb server in your host computer if you are running it already
adb kill-server
Build the docker-compose file again to install necessary packages like adb,celery,amqp etc.
docker-compose up build
Create some user for testing(from createuser interface) also enable flight mode since it will charge you after sending message if you have not enabled it
Then simply go to alertInterface in localhost:3000 then click send message button the message will be sent in background