docs(README): add podman.socket for running run.sh/smoketest.sh (#1594)…

… (#1596)

(cherry picked from commit bff37a1)

Co-authored-by: Ming Yu Wang <90855268+mwangggg@users.noreply.github.com>

README.md

@@ -51,6 +51,7 @@ Build Requirements:
 
 Run Requirements:
 - Kubernetes/OpenShift/Minishift, Podman/Docker, or other container platform
+- `systemctl --user enable --now podman.socket` to enable the user podman.socket for podman discovery
 
 ## BUILD