docs: document using ISO for mgmt plane

This PR documents the usage of the ISO for mgmt plane. It's mostly just
a note that it can be done and providing links to how to use the ISO and
then back to the Getting Started tutorial.

Signed-off-by: Spencer Smith <robertspencersmith@gmail.com>

website/content/docs/v0.2/Guides/iso.md

@@ -0,0 +1,23 @@
+---
+description: "A guide for bootstrapping Sidero management plane using the ISO image"
+weight: 1
+title: "Building A Management Plane with ISO Image"
+---
+
+This guide will provide some very basic detail about how you can also build a Sidero management plane using the Talos ISO image instead of following the Docker-based process that we detail in our Getting Started tutorials.
+
+Using the ISO is a perfectly valid way to build a Talos cluster, but this approach is not recommended for Sidero as it avoids the "pivot" step detailed [here](../Getting%20Started/pivot.md).
+Skipping this step means that the management plane does not become "self-hosted", in that it cannot be upgraded and scaled using the Sidero processes we follow for workload clusters.
+For folks who are willing to take care of their management plane in other ways, however, this approach will work fine.
+
+The rough outline of this process is very short and sweet, as it relies on other documentation:
+
+- For each management plane node, boot the ISO and install Talos using the "apply-config" process mentioned in our Talos [Getting Started](https://www.talos.dev/docs/v0.10/introduction/getting-started/) docs.
+  These docs go into heavy detail on using the ISO, so they will not be recreated here.
+
+- With a Kubernetes cluster now in hand (and with access to it via `talosctl` and `kubectl`), you can simply pickup the Getting Started tutorial at the "Install Sidero" section [here](../Getting%20Started/install-clusterapi.md).
+  Keep in mind, however, that you will be unable to do the "pivoting" section of the tutorial, so just skip that step when you reach the end of the tutorial.
+
+> Note: It may also be of interest to view the prereq guides on [CLI](../Getting%20Started/prereq-cli-tools.md) and [DHCP](../Getting%20Started/prereq-dhcp.md) setup, as they will still apply to this method.
+
+- For long-term maintenance of a management plane created in this way, refer to the Talos documentation for upgrading [Kubernetes](https://www.talos.dev/docs/v0.10/guides/upgrading-kubernetes/) and [Talos](https://www.talos.dev/docs/v0.10/guides/upgrading-talos/) itself.

website/content/docs/v0.3/Guides/iso.md

@@ -0,0 +1,23 @@
+---
+description: "A guide for bootstrapping Sidero management plane using the ISO image"
+weight: 1
+title: "Building A Management Plane with ISO Image"
+---
+
+This guide will provide some very basic detail about how you can also build a Sidero management plane using the Talos ISO image instead of following the Docker-based process that we detail in our Getting Started tutorials.
+
+Using the ISO is a perfectly valid way to build a Talos cluster, but this approach is not recommended for Sidero as it avoids the "pivot" step detailed [here](../Getting%20Started/pivot.md).
+Skipping this step means that the management plane does not become "self-hosted", in that it cannot be upgraded and scaled using the Sidero processes we follow for workload clusters.
+For folks who are willing to take care of their management plane in other ways, however, this approach will work fine.
+
+The rough outline of this process is very short and sweet, as it relies on other documentation:
+
+- For each management plane node, boot the ISO and install Talos using the "apply-config" process mentioned in our Talos [Getting Started](https://www.talos.dev/docs/v0.10/introduction/getting-started/) docs.
+  These docs go into heavy detail on using the ISO, so they will not be recreated here.
+
+- With a Kubernetes cluster now in hand (and with access to it via `talosctl` and `kubectl`), you can simply pickup the Getting Started tutorial at the "Install Sidero" section [here](../Getting%20Started/install-clusterapi.md).
+  Keep in mind, however, that you will be unable to do the "pivoting" section of the tutorial, so just skip that step when you reach the end of the tutorial.
+
+> Note: It may also be of interest to view the prereq guides on [CLI](../Getting%20Started/prereq-cli-tools.md) and [DHCP](../Getting%20Started/prereq-dhcp.md) setup, as they will still apply to this method.
+
+- For long-term maintenance of a management plane created in this way, refer to the Talos documentation for upgrading [Kubernetes](https://www.talos.dev/docs/v0.10/guides/upgrading-kubernetes/) and [Talos](https://www.talos.dev/docs/v0.10/guides/upgrading-talos/) itself.