This works for me on Ubuntu 22.10:

  $ sudo apt install podman buildah
  $ mkdir empty && cd empty
  $ cat > Containerfile <<EOF
  FROM alpine:3.14
  RUN echo 'echo hello podman!' > /root/hello.sh
  ENTRYPOINT ["/bin/sh", "/root/hello.sh"]
  EOF
  $ buildah build -f Containerfile -t hello-podman .
  $ podman run -it --rm  localhost/hello-podman:latest
  hello podman!

edit: stryan has more minimalist instructions above.

AH, so it must be the localhost/hello-podman:latest was the axle-wrap.

I will now bitch about how everything needs to be converted to some obscure url or pseudo-url when a file path would do. This has bitten me on:

- JSP tag libraries

- XML xsd references (which back in the Spring XML namespace-go-nuts era was really annoying)

- file:///fully/qualified/path

There, I have bitched.

Were you building from a Dockerfile or Containerfile? If so, you don't need to use buildah you can just use podman build, same as you would docker. So to build an image from a Dockerfile/Containerfile in the current directory just run

podman build -t what_the_image_to_be_tagged .

Then to reference the container by name when you run it, you gotta specify that at runtime:

podman run --name foo the_image_you_just_tagged