if disk space is greater than 80% then Remove all docker images

ecr_login.sh

#!/bin/bash

export docker_server=https://AWS_ACCOUNT_ID.dkr.ecr.eu-central-1.amazonaws.com
export token=$(aws ecr get-authorization-token --query authorizationData[].authorizationToken --output text | base64 -d | cut -d: -f2)

#export login=`echo $aws_login`

#$login
docker login -u AWS -p $token $docker_server

remove-docker-images.sh

#!/bin/bash

volume='/dev/xvda1'
space=$(df -H $volume | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 }')
cmd=$(df -H $volume | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 }' | cut -d'%' -f1)

if [ $cmd -ge 80 ]; then
   echo "Running out of space. Deleting docker images"
   docker rm $(docker ps -a -q)
   docker rmi $(docker images -aq)
else
   echo "Diskspace is available $volume : $space"
fi