addition of podman tutorial to container/image registry page

Author: Bharath Kaimal

docs/containers/imageregistry.md

@@ -4,9 +4,71 @@ A registry is a repository used to store and access container images. Container
 
 Container registries save developers valuable time in the creation and delivery of cloud-native applications, acting as the intermediary for sharing container images between systems. They essentially act as a place for developers to store container images and share them out via a process of uploading (pushing) to the registry and downloading (pulling) into another system, like a Kubernetes cluster.
 
-[Learn More :fontawesome-solid-globe:](https://www.redhat.com/en/topics/cloud-native-apps/what-is-a-container-registry){ .md-button target="_blank"}
+[Learn More :fontawesome-solid-globe:](https://www.redhat.com/en/topics/cloud-native-apps/what-is-a-container-registry){ .md-button target="\_blank"}
 
-=== "Tutorial"
+## Tutorial
+
+=== "Podman"
+
+      Make sure you have Podman Desktop installed and up and running.
+
+      Here's how to find a list of publicly available container images on DockerHub.
+
+      ``` Bash title="Find Container Image"
+      podman search docker.io/busybox
+      ```
+
+      ``` Bash title="Output:"
+      NAME                                         DESCRIPTION
+      docker.io/library/busybox                    Busybox base image.
+      docker.io/rancher/busybox
+      docker.io/openebs/busybox-client
+      docker.io/antrea/busybox
+      docker.io/hugegraph/busybox                  test image
+      ...
+      ```
+
+      We can create a _busybox_ container image based off of the _busybox_ base image you see listed in the output above.
+
+      ``` Bash title="Create Image"
+      podman run -it docker.io/library/busybox
+      ```
+
+      The _-it_ flag allows you to run the image in interactive mode. Interactive mode in Podman allows you to run a shell in a container and interact with it. However, you'll see that running small containers like this one don't have much to play around with in the interactive mode. To exit out of the interactive mode:
+
+      ``` Bash title="Exit Interactive mode"
+      exit
+      ```
+
+      You can also share images in a public registry so that others can use and review them. Here's how to push your image up to quay.io.
+
+      ``` Bash title="Login to quay.io"
+      podman login quay.io
+      ```
+      Enter in the following info:
+
+      ```
+      Username: your_username
+      Password: your_password
+      ```
+
+      Next, tag the image so that you can push it and find it in your account.
+
+      ``` Bash title="Tag Image"
+      podman tag <image_name> quay.io/your_username/image_registry_name
+      ```
+
+      Make sure to replace "image_name" with the name of the image you want to push up to quay.
+      Replace "user_name" with your quay.io username.
+      Replace "image_registry_name" with what you want the image to be named/labeled as in quay.
+
+      Once the image is tagged, you can push it up to quay.
+
+      ``` Bash title="Push Image"
+      podman push quay.io/your_username/image_registry_name
+      ```
+
+=== "Docker"
 
       Make sure you have Docker Desktop installed and up and running.
 
@@ -17,7 +79,7 @@ Container registries save developers valuable time in the creation and delivery
       Email: your_email
       ```
 
-      First we'll create a container with a single new file based off of the busybox base image: 
+      First we'll create a container with a single new file based off of the busybox base image:
       ``` Bash title="Create a new container"
       docker run busybox echo "fun" > newfile
       ```
@@ -40,7 +102,5 @@ Container registries save developers valuable time in the creation and delivery
       Your respository has now been pushed to Quay Container Registry!
 
       To view your repository, click on the button below:
-      
-      [Repositories](https://quay.io/repository/){ .md-button target="_blank"}
 
-      
+      [Repositories](https://quay.io/repository/){ .md-button target="_blank"}