So, copy and paste the whole command bellow:

INSTALL_SCRIPT=install-docker.sh
touch $INSTALL_SCRIPT && sudo chmod +x $INSTALL_SCRIPT  && \\
 > $INSTALL_SCRIPT
INSTALL_STR="#!/bin/bash \\n"
INSTALL_STR+="\\n"
INSTALL_STR+="curl -fsSL get.docker.com -o get-docker.sh\\n"
INSTALL_STR+="sh get-docker.sh\\n"
INSTALL_STR+="sudo curl -L <https://github.com/docker/compose/releases/download/v2.4.1/docker-compose-$>(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose\\n"
INSTALL_STR+="sudo chmod +x /usr/local/bin/docker-compose\\n" 
INSTALL_STR+="docker-compose --version \\n"
INSTALL_STR+="sudo usermod -aG docker $USER\\n"
INSTALL_STR+="sudo chmod 666 /var/run/docker.sock\\n"
printf "$INSTALL_STR" >> $INSTALL_SCRIPT
./$INSTALL_SCRIPT
rm $INSTALL_SCRIPT