Add doc for the images (#587)

Author: mkumatag

docs/book/src/SUMMARY.md

@@ -2,6 +2,9 @@
 
 - [Introduction](./introduction.md)
 - [Getting Started](./getting-started.md)
+- [Images](./machine-images/index.md)
+  - [VPC](./machine-images/vpc.md)
+  - [Power VS](./machine-images/powervs.md)
 - [Topics](./topics/index.md)
   - [VPC Cluster](./topics/vpc/index.md)
     - [Prerequisites](./topics/vpc/prerequisites.md)

docs/book/src/machine-images/index.md

@@ -0,0 +1,7 @@
+## IBM Cloud Machine Images for CAPIBM Clusters
+
+CAPIBM requires a “machine image” containing pre-installed, matching versions of kubeadm and kubelet. Machine image is required during the cluster creation in the AWSMachineTemplate spec.
+
+Pre-built public Images are published by the maintainers regularly for each new Kubernetes version.
+
+>Note: These images are only for the test purpose

docs/book/src/machine-images/powervs.md

@@ -0,0 +1,9 @@
+# Power VS Images
+
+
+| Region   | Bucket           | Object                                                          | Kubernetes Version |
+|----------|------------------|-----------------------------------------------------------------|--------------------|
+| us-south | power-oss-bucket | [capibm-powervs-centos-streams8-1-22-4.ova.gz][streams8-1-22-4] | 1.22.4             |
+
+
+[streams8-1-22-4]: https://power-oss-bucket.s3.us-south.cloud-object-storage.appdomain.cloud/capibm-powervs-centos-streams8-1-22-4.ova.gz

docs/book/src/machine-images/vpc.md

@@ -0,0 +1 @@
+This page is still being written - stay tuned!