How to execute a Bash script from GitHub Gist?

docker_installer.sh

#!/bin/bash

##################################################################################
#     ----------------------------------------------------------------
#     THIS SCRIPT WILL HELP YOUR AUTOMATE THE DOCKER INSTALATION STEPS
#     ----------------------------------------------------------------
# Test was run via aws ec2 instance. 
#
# AUTHOR:
# Name: Allie Silver Ubisse 
# Email: AllieSilverUbisse@gmail.com
##################################################################################
#
#
#
echo "============================================================================"
echo "( 1 of 7 ) WARMING: You are about to install docker to your machine "
echo "============================================================================"
#
sudo apt-get update 

echo "========================================================================================================="
echo "( 2 of 7 ) Installing: curl apt-transport-https ca-certificates gnupg-agent software-properties-common "
echo "========================================================================================================="
sudo apt-get install \
    apt-transport-https \
    ca-certificates\
    curl \
    gnupg-agent \
    software-properties-common -y
    
echo "============================================================================"
echo "( 3 of 7 ) TASK "
echo "============================================================================"
#
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

echo "============================================================================"
echo "( 4 of 7 ) INSTALLING:  docker-ce docker-ce-cli containerd.io "
echo "============================================================================"
#
sudo apt-get install docker-ce docker-ce-cli containerd.io
apt-cache madison docker-ce

echo "============================================================================"
echo "( 5 of 7 ) INSTALLING:  install docker-ce docker-ce-cli containerd.io "
echo "============================================================================"
#
sudo apt-get install docker-ce docker-ce-cli containerd.io

echo "============================================================================"
echo "( 6 of 7 ) INSTALLING: docker.io "
echo "============================================================================"
#
sudo apt install docker.io

echo "============================================================================"
echo "( 7 of 7 ) INSTALLING: docker-compose "
echo "============================================================================"
#
sudo apt install docker-compose

echo "============================================================================"
echo "( 7 of 7 ) INSTALLING: docker-compose "
echo "============================================================================"
#