Update install_docker.sh

Always get the latest docker-compose version.

install_docker.sh

@@ -32,10 +32,14 @@ echo "";
 echo "If you like you can add a user to the docker group";
 echo "sudo usermod -aG docker user_name";
 
+# get latest docker compose released tag
+COMPOSE_VERSION=$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep 'tag_name' | cut -d\" -f4)
+
+# Install docker-compose
+sh -c "curl -L https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose"
+chmod +x /usr/local/bin/docker-compose
+sh -c "curl -L https://raw.githubusercontent.com/docker/compose/${COMPOSE_VERSION}/contrib/completion/bash/docker-compose > /etc/bash_completion.d/docker-compose"
 
-# Installing docker-compose
-sudo curl -L "https://github.com/docker/compose/releases/download/1.29.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
-sudo chmod +x /usr/local/bin/docker-compose
 docker-compose --version
 
 # Optional create symbolic link: