chore: updated some of the use cases docs

Use Cases/Serving the Root Filesystem with NFS (import-image.sh).md

@@ -18,3 +18,48 @@ Reload the NFS daemon to apply the changes.
 modprobe -r nfsd && modprobe nfsd
 ```
 
+For NFS, we need to update the /etc/exports file and then reload the kernel nfs daemon
+
+Create `/opt/nfsroot` to serve our images
+
+```bash
+sudo mkdir /srv/nfs
+sudo chown rocky: /srv/nfs
+```
+
+  - Create the `/etc/exports` file with the following contents to export the `/srv/nfs` directory for use by our compute nodes
+    ```bash
+    /srv/nfs *(ro,no_root_squash,no_subtree_check,noatime,async,fsid=0)
+    ```
+
+  - Reload the nfs daemon
+    ```bash
+    sudo modprobe -r nfsd && sudo modprobe nfsd
+    ```
+
+### Webserver for Boot Artifacts
+
+We expose our NFS directory over https as well to make it easy to serve boot artifacts.
+
+```yaml
+# nginx.container
+[Unit]
+Description=Serve /srv/nfs over HTTP
+After=network-online.target
+Wants=network-online.target
+
+[Container]
+ContainerName=nginx
+Image=docker.io/library/nginx:1.28-alpine
+Volume=/srv/nfs:/usr/share/nginx/html:Z
+PublishPort=80:80
+
+[Service]
+TimeoutStartSec=0
+Restart=always
+```
+
+### Import Images from OCI to Share with NFS
+
+[Import-image Script](https://github.com/OpenCHAMI/image-builder/blob/main/scripts/image-import.sh)
+