docs: add gateway overview illustration

website/content/docs/connect/gateways/index.mdx

@@ -13,6 +13,8 @@ This topic provides an overview of the gateway features shipped with Consul. Gat
 - [Ingress gateways](#ingress-gateways) enable services to accept traffic from outside the Consul service mesh.
 - [Terminating gateways](#terminating-gateways) enable you to route traffic from services in the Consul service mesh to external services.
 
+![Gateway Architecture](/img/consul-connect/svgs/consul_gateway_overview.svg)
+
 ## Mesh Gateways
 
 -> **1.6.0+:** This feature is available in Consul versions 1.6.0 and newer.
@@ -25,9 +27,9 @@ They operate by sniffing and extracting the server name indication (SNI) header
 
 Mesh gateways enable the following scenarios:
 
-* **Federate multiple datacenters across a WAN**. Since Consul 1.8.0, mesh gateways can forward gossip and RPC traffic between Consul servers. See [WAN federation via mesh gateways](/docs/connect/gateways/wan-federation-via-mesh-gateways) for additional information. 
-* **Service-to-service communication across datacenters**. Refer to [Enabling Service-to-service Traffic Accross Datacenters](/docs/connect/gateways/mesh-gateway/service-to-service-traffic-datacenters) for additional information. 
-* **Service-to-service communication across admin partitions**. Since Consul 1.11.0, you can create administrative boundaries for single Consul deployements called "admin partitions". You can use mesh gateways to facilitate cross-partition communication. Refer to [Enabling Service-to-service Traffic Accross Admin Partitions](/docs/connect/gateways/mesh-gateway/service-to-service-traffic-partitions) for additional information.
+- **Federate multiple datacenters across a WAN**. Since Consul 1.8.0, mesh gateways can forward gossip and RPC traffic between Consul servers. See [WAN federation via mesh gateways](/docs/connect/gateways/wan-federation-via-mesh-gateways) for additional information.
+- **Service-to-service communication across datacenters**. Refer to [Enabling Service-to-service Traffic Accross Datacenters](/docs/connect/gateways/mesh-gateway/service-to-service-traffic-datacenters) for additional information.
+- **Service-to-service communication across admin partitions**. Since Consul 1.11.0, you can create administrative boundaries for single Consul deployements called "admin partitions". You can use mesh gateways to facilitate cross-partition communication. Refer to [Enabling Service-to-service Traffic Accross Admin Partitions](/docs/connect/gateways/mesh-gateway/service-to-service-traffic-partitions) for additional information.
 
 -> **Mesh gateway tutorial**: Follow the [mesh gateway tutorial](https://learn.hashicorp.com/tutorials/consul/service-mesh-gateways) to learn concepts associated with mesh gateways.