Add Podman Hello to readme.md

As the title says.  Adds a Podman hello image
to the home page.  I ran it on windows, so had to have
a blue screen to honor that!

[NO NEW TESTS NEEDED]

Signed-off-by: tomsweeneyredhat <tsweeney@redhat.com>

README.md

@@ -162,6 +162,33 @@ you to manage and maintain those images and containers in a production environme
 familiar container cli commands.  For more details, see the
 [Container Tools Guide](https://github.com/containers/buildah/tree/master/docs/containertools).
 
+## [Podman Hello](https://podman.io/images/podman-hello.jpg)
+```
+$ podman run quay.io/podman/hello
+Trying to pull quay.io/podman/hello:latest...
+Getting image source signatures
+Copying blob a6b3126f3807 done
+Copying config 25c667d086 done
+Writing manifest to image destination
+Storing signatures
+!... Hello Podman World ...!
+
+         .--"--.
+       / -     - \
+      / (O)   (O) \
+   ~~~| -=(,Y,)=- |
+    .---. /`  \   |~~
+ ~/  o  o \~~~~.----. ~~
+  | =(X)= |~  / (O (O) \
+   ~~~~~~~  ~| =(Y_)=-  |
+  ~~~~    ~~~|   U      |~~
+
+Project:   https://github.com/containers/podman
+Website:   https://podman.io
+Documents: https://docs.podman.io
+Twitter:   @Podman_io
+```
+
 ## Podman Former API (Varlink)
 Podman formerly offered a Varlink-based API for remote management of containers. However, this API
 was replaced by the REST API. Varlink support has been removed as of the 3.0 release.