Merge pull request #23 from jeckersb/explicit-podman-machine-setup

README.md: be very explicit about podman machine setup requirements

Author: germag

README.md

@@ -14,7 +14,8 @@ in alignment with the <https://github.com/containers/bootc> project.
 Requirements:
 
 - [bootc extension requirements](https://github.com/containers/podman-desktop-extension-bootc?tab=readme-ov-file#requirements)
-- (Even on Linux, you *must* set up `podman machine` with a rootful connection; see below)
+  - (Even on Linux, you *must* set up `podman machine` with a rootful connection; see below)
+  - `podman machine init --rootful && podman machine start`
 - qemu-system-x86_64/qemu-system-aarch64
 - xorriso/osirrox
 - golang