add docker install to arch workstation

arch/workstation.md

@@ -4,6 +4,7 @@
   - [Base Tools](#base-tools)
   - [ZSH](#zsh)
   - [Podman](#podman)
+  - [Docker](#docker)
   - [QEMU/KVM](#qemukvm)
     - [Arch Guests](#arch-guests)
   - [Kubernetes](#kubernetes)
@@ -64,6 +65,19 @@ podman network create test
 podman kube play --network test podman-deploy.yaml --replace
 ```
 
+## Docker
+
+```bash
+podman -Sy docker docker-compose
+usermod -aG docker ducoterra
+```
+
+logout, log back in to use docker as non-root user.
+
+You can use btrfs as your storage driver by following these instructions:
+
+<https://docs.docker.com/storage/storagedriver/btrfs-driver/>
+
 ## QEMU/KVM
 
 1. Install virtualization capabilties