docs: update TLS docs + metrics-server optionality

docs/application-baseline.md

@@ -17,7 +17,7 @@ For optimal deployment and operational efficiency, it is important to deliver a
 | **Capability**                     | **Application**                                                                                                                                                                                                                                                                                                                                       |
 | ---------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | **Service Mesh**                   | **[Istio](https://istio.io/):** A powerful service mesh that provides traffic management, load balancing, security, and observability features.                                                                                                                                                                                                                       |
-| **Monitoring**                     | **[Metrics Server](https://kubernetes-sigs.github.io/metrics-server/):** Provides container resource utilization metrics API for Kubernetes clusters.<br><br>**[Prometheus](https://prometheus.io/):** Scrapes Metrics Server API and application metrics and stores the data in a time-series database for insights into application health and performance.<br><br> **[Grafana](https://grafana.com/grafana/):** Provides visualization and alerting capabilities based on Prometheus's time-series database of metrics. |
+| **Monitoring**                     | **[Metrics Server](https://kubernetes-sigs.github.io/metrics-server/):** Provides container resource utilization metrics API for Kubernetes clusters. Metrics server is an optional (non-default) component since most Kubernetes distros provide it by default.<br><br>**[Prometheus](https://prometheus.io/):** Scrapes Metrics Server API and application metrics and stores the data in a time-series database for insights into application health and performance.<br><br> **[Grafana](https://grafana.com/grafana/):** Provides visualization and alerting capabilities based on Prometheus's time-series database of metrics. |
 | **Logging**                        | **[Promtail](https://grafana.com/docs/loki/latest/send-data/promtail/):** A companion agent that efficiently gathers and sends container logs to Loki, simplifying log monitoring, troubleshooting, and compliance auditing, enhancing the overall observability of the mission environment.<br><br> **[Loki](https://grafana.com/docs/loki/latest/):** A log aggregation system that allows users to store, search, and analyze logs across their applications. |
 | **Security and Compliance**        | **[NeuVector](https://open-docs.neuvector.com/):** Offers container-native security, protecting applications against threats and vulnerabilities.<br><br> **[Pepr](https://pepr.dev/):** UDS policy engine and operator for enhanced security and compliance.|
 | **Identity and Access Management** | **[Keycloak](https://www.keycloak.org/):** A robust open-source Identity and Access Management solution, providing centralized authentication, authorization, and user management for enhanced security and control over access to mission-critical resources.|

docs/configuration/istio/ingress.md

@@ -38,7 +38,7 @@ packages:
 
 By default, the UDS Core Istio Gateways are set up to use the `uds.dev` domain and have a valid TLS certificate packaged.  You will want to change the domain name for your environment and provide a valid TLS certificate for this domain.
 
-You can set the TLS certs via overrides in a [UDS Bundle](https://uds.defenseunicorns.com/bundles/) (see below).
+You can set the TLS certs via overrides in a [UDS Bundle](https://uds.defenseunicorns.com/bundles/) (see below). UDS Core Istio Gateways default to only supporting TLS v1.3, but this can also be overridden per gateway if clients use TLS 1.2 (as seen in the tenant gateway example `value` below).
 
 ```yaml
 kind: UDSBundle
@@ -63,6 +63,9 @@ packages:
               path: tls.key
       istio-tenant-gateway:
         uds-istio-config:
+          values:
+            - path: tls.supportTLSV1_2
+              value: true # Add support for TLS 1.2 on this gateway, can be specified via variables if needed at deploy time
           variables:
             - name: TENANT_TLS_CERT
               description: "The TLS cert for the tenant gateway (must be base64 encoded)"