Docker
A Docker container allows you to easily run a node without depending on the platform it is running on. This method should only be used if you already have experience with Docker containers.
Installation
Start by installing docker: How to install Docker on Ubuntu
Create a local directory for the chain storage data and a dedicated user:
sudo mkdir /var/lib/astar
sudo useradd --no-create-home --shell /usr/sbin/nologin astar
sudo chown astar:astar /var/lib/astar