Improve error message when the the podman service is not enabled

[rhatdan]

Currently if server is not connected, we return an error message that
is confusing users on Mac and Windows boxes. The hope here is to make
it a little easier to discover that a Podman service is required.

This message is similar to what Docker puts out so people might under
stand it better.

Signed-off-by: Daniel J Walsh [email protected]

[openshift-ci-robot]

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[rhatdan]

@afbjorklund PTAL

[afbjorklund]

Works for me.

podman-remote
Error: Cannot connect to the Podman socket, make sure there is a Podman REST API service running.: Get "http://d/v2.0.0/libpod/_ping": dial unix ///run/user/1000/podman/podman.sock: connect: no such file or directory

Similar enough to:

docker (rootless)
Cannot connect to the Docker daemon at unix:///run/user/1000/docker.sock. Is the docker daemon running?

[rhatdan]

@containers/podman-maintainers PTAL

[Luap99]

LGTM

[mheon]

/lgtm