Change the docs markdown so that flag names will be h4 headers.
Sphinx will automatically add anchors to headers. Add css to
make sure the flag names are not to big compared to the text.
The man pages also still renders fine but it looks a bit different.
Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
This makes it clear that we target compatibility with a specific
Docker version (v1.40), but do not reject other versions. It also
adds a link to documentation on the Podman-specific API.
Signed-off-by: Matthew Heon <mheon@redhat.com>
