How to install docker on ubuntu?

@emilia_hackett 

To install Docker on Ubuntu, you will need to follow these steps:

1. Update your existing list of packages:

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sudo apt-get update

1. Install packages to allow apt to use a repository over HTTPS:

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sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

1. Add the GPG key for the official Docker repository to your system:

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curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

1. Add the Docker repository to APT sources:

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sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

1. Update the package database with the Docker packages from the newly added repository:

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sudo apt-get update

1. Install Docker:

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sudo apt-get install docker-ce

1. Start the Docker daemon:

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sudo systemctl start docker

1. Verify that Docker is installed correctly by running the hello-world image:

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sudo docker run hello-world

This should pull the hello-world image and run it in a container. If the installation was successful, you will see a message similar to the following:

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Hello from Docker!
This message shows that your installation appears to be working correctly.

That's it! Docker should now be installed on your Ubuntu system.

@emilia_hackett 

Please note that these instructions are specifically for Ubuntu 20.04, but the steps should be similar for other versions of Ubuntu as well.