Install docker using amazon-linux-extras

templates/user-data.sh.tmpl

@@ -7,7 +7,7 @@ exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1
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 function install_docker_ce() {
-  sudo yum install -y docker-20.10.4-1.amzn2
+  sudo amazon-linux-extras install docker
   sudo systemctl enable docker
   sudo systemctl start docker
   sudo usermod -a -G docker ec2-user