update kots temp func docs with ecv3 limitations

Author: paigecalvert

docs/reference/template-functions-about.mdx

@@ -12,7 +12,7 @@ This topic describes Replicated template functions, including information about
 
 ## Overview
 
-For Kubernetes manifest files for applications deployed by a Replicated installer (Embedded Cluster, KOTS, kURL), Replicated provides a set of custom template functions based on the Go text/template library. 
+Replicated provides a set of custom template functions based on the Go text/template library. You can use the Replicated template functions in Kubernetes manifest files for applications deployed by a Replicated installer (Embedded Cluster, KOTS, kURL).
 
 <UseCases/>
 
@@ -26,16 +26,6 @@ You can use Replicated template functions in Kubernetes manifest files for appli
 * Kubernetes objects like Deployments, Services, Secrets, or ConfigMaps
 * Kubernetes Operators
 
-### Limitations
-
-* Not all fields in the Config and Application custom resources support templating. For more information, see [Application](/reference/custom-resource-application) and [Item Properties](/reference/custom-resource-config#item-properties) in _Config_.
-
-* Templating is not supported in the [Embedded Cluster Config](/embedded-cluster/v3/embedded-config) resource.
-
-* Replicated template functions are not directly supported in Helm charts. For more information, see [Helm Charts](#helm-charts) below.
-
-### Helm charts
-
 Replicated template functions are _not_ directly supported in Helm charts. However, the HelmChart custom resource provides a way to map values rendered by Replicated template functions to Helm chart values. This allows you to use Replicated template functions with Helm charts without making changes to those Helm charts.
 
 For information about how to map values from the HelmChart custom resource to Helm chart `values.yaml` files, see [Setting Helm Chart Values with KOTS](/vendor/helm-optional-value-keys).
@@ -46,6 +36,23 @@ During application installation and upgrade, KOTS templates all Kubernetes manif
 
 For the [Config](/reference/custom-resource-config) custom resource, KOTS templates each item separately so that config items can be used in templates for other items. For examples of this, see [Using Conditional Statements in Configuration Fields](/vendor/config-screen-conditional) and [Template Function Examples](/reference/template-functions-examples).
 
+### Limitations
+
+* Not all fields in the Config and Application custom resources support templating. For more information, see [Application](/reference/custom-resource-application) and [Item Properties](/reference/custom-resource-config#item-properties) in _Config_.
+
+* Templating is not supported in the [Embedded Cluster Config](/embedded-cluster/v3/embedded-config) resource.
+
+* Replicated template functions are not directly supported in Helm charts. For more information, see [Helm Charts](#helm-charts) on this page.
+
+* Embedded Cluster v3 does not support the following template functions:
+  * HasLocalRegistry
+  * LocalRegistryAddress
+  * LocalRegistryHost
+  * LocalRegistryNamespace
+  * LocalImageName
+
+  These template functions are typically used to conditionally rewrite image references in air gap installations to reference the local image registry. For Embedded Cluster v3 installations, use the ReplicatedImageName, ReplicatedImageName, and ReplicatedImageName template functions instead. For more information, see [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+
 ## Syntax {#syntax}
 
 The Replicated template function syntax supports the following functionally equivalent delimiters:

docs/reference/template-functions-config-context.md

@@ -194,6 +194,10 @@ Returns true if the configuration option value is not equal to the supplied valu
 
 ## LocalRegistryAddress
 
+:::note
+The LocalRegistryAddress template function is not supported for installations with Embedded Cluster v3. See [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+:::
+
 ```go
 func LocalRegistryAddress() string
 ```
@@ -203,6 +207,10 @@ This will always return everything before the image name and tag.
 
 ## LocalRegistryHost
 
+:::note
+The LocalRegistryHost template function is not supported for installations with Embedded Cluster v3. See [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+:::
+
 ```go
 func LocalRegistryHost() string
 ```
@@ -236,6 +244,10 @@ For more information, see [Set Helm Values with KOTS](/vendor/helm-optional-valu
 
 ## LocalRegistryNamespace
 
+:::note
+The LocalRegistryNamespace template function is not supported for installations with Embedded Cluster v3. See [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+:::
+
 ```go
 func LocalRegistryNamespace() string
 ```
@@ -267,6 +279,10 @@ For more information, see [Set Helm Values with KOTS](/vendor/helm-optional-valu
 
 ## LocalImageName
 
+:::note
+The LocalImageName template function is not supported for installations with Embedded Cluster v3. See [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+:::
+
 ```go
 func LocalImageName(remoteImageName string) string
 ```
@@ -346,6 +362,10 @@ spec:
 
 ## HasLocalRegistry
 
+:::note
+The HasLocalRegistry template function is not supported for installations with Embedded Cluster v3. See [Template Functions for Embedded Cluster (Beta)](/embedded-cluster/v3/template-functions).
+:::
+
 ```go
 func HasLocalRegistry() bool
 ```