Installing Docker on Raspberry Pi 4

1. Update repository and upgrade packages

   sudo apt-get update
   sudo apt-get upgrade
   

2. Download installer from get.docker and install Docker

   curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
   

   

3. Add "pi" user to Docker Group

   sudo usermod -aG docker pi
   

4. Setup the Docker Repo

   nano /etc/apt/sources.list.d/docker.list
   

   Add this

   deb https://download.docker.com/linux/raspbian/ stretch stable
   

5. Update repository and upgrade packages again

   sudo apt-get update
   sudo apt-get upgrade