Add Skopeo FSS doc

Author: OguzPastirmaci

docs/oke-fss-skopeo.md

@@ -0,0 +1,49 @@
+# Importing images from OCI File Storage Service (FSS) to OKE nodes instead of downloading them from a registry
+
+### 1. Create an FSS File System
+https://docs.oracle.com/en-us/iaas/Content/File/Tasks/create-file-system.htm#top
+
+### 2. Mount the FSS File System to your worker nodes
+https://docs.oracle.com/en-us/iaas/Content/File/Tasks/mountingunixstyleos.htm#mountingFS
+
+> [!NOTE]  
+> This guide assumes you mounted FSS to `/mnt/share`. You can select different throughput levels for your mount target. Select the one that would give you enough performance: 1 Gbps, 20 Gbps, 40 Gbps, 80 Gbps.
+
+
+### 3. Install `skopeo` in your worker nodes and create a dir under /mnt/share (we'll use /mnt/share/images as the example)
+```
+apt update
+apt install -y skopeo
+mkdir -p /mnt/share/images
+```
+### 4. Using `skopeo`, copy the image from a registry to the FSS shared folder
+We'll use the Docker registry, but any registry including private ones can be used.
+
+```
+skopeo copy docker://busybox:latest dir:/mnt/share/images/busybox
+
+Getting image source signatures
+Copying blob 2fce1e0cdfc5 done
+Copying config 6fd955f66c done
+Writing manifest to image destination
+Storing signatures
+```
+
+### Now the image is pulled to the FSS shared folder. You can import/copy it to any other worker node.
+
+```
+skopeo copy dir:/mnt/share/images/busybox containers-storage:busybox:latest
+```
+
+Check that the image is imported. On your worker node:
+```
+crictl images
+
+IMAGE                                                               TAG                 IMAGE ID            SIZE
+ap-melbourne-1.ocir.io/axoxdievda5j/oke-public-cloud-provider-oci   <none>              8310661879155       582MB
+ap-melbourne-1.ocir.io/axoxdievda5j/oke-public-flannel              <none>              8bbca5abb5f3e       308MB
+ap-melbourne-1.ocir.io/axoxdievda5j/oke-public-kube-proxy           <none>              c4f3122c5b070       1.28GB
+ap-melbourne-1.ocir.io/axoxdievda5j/oke-public-pause                <none>              e105b7466686e       146MB
+ap-melbourne-1.ocir.io/axoxdievda5j/oke-public-proxymux-cli         <none>              14330458a37d2       197MB
+docker.io/library/busybox                                           latest              6fd955f66c231       4.5MB
+```