Stop all docker containers - Bash Automation

#!/bin/sh
#####
#mmm, misraX
##### Automatically stop all docker containers ##########

# Loop over containeres, awk the first col "CONTAINER"
# exclude the string that start with ! /CONT/ to exclude CONTAINER ID
# as it's an invalid container ID.
for i in $(docker ps | awk '! /CONT/ {print $1}')
do 
    # Stop containers by ID
    docker stop "$i" && echo "docker stopped" "$i"
done