feat(tutorials): Add Gateway API

Signed-off-by: Sascha Spreitzer <[email protected]>

Author: sspreitzer

content/docs/tutorials/README.md

@@ -6,6 +6,14 @@ description: 'cert-manager tutorials: Overview'
 Step-by-step tutorials are a great way to get started with cert-manager, and we provide a few
 for you to learn from. Take a look!
 
+### Gateway API Tutorials
+
+- [Securing Cilium Gateway API](./acme/cilium-gateway-api.md): A tutorial for deploying Kubernetes Gateway API in combination with Cilium and securing ingress traffic with certificates from `Let's Encrypt` with the Automatic Certificate Management Environment (ACME) mechanism.
+
+### Ingress Tutorials
+
+Kubernetes Ingress is in a feature freeze state in favor of the Kubernetes Gateway API. See the [Kubernetes Ingress](https://kubernetes.io/docs/concepts/services-networking/ingress/) and [Kubernetes Gateway API](https://kubernetes.io/docs/concepts/services-networking/gateway/) documentation.
+
 - [Securing Ingresses with NGINX-Ingress and cert-manager](./acme/nginx-ingress.md): Tutorial for deploying NGINX into your
   cluster and securing incoming connections with a certificate from Let's Encrypt.
 - [GKE + Ingress + Let's Encrypt](./getting-started-with-cert-manager-on-google-kubernetes-engine-using-lets-encrypt-for-ingress-ssl/README.md):

content/docs/tutorials/acme/cilium-gateway-api.md

@@ -0,0 +1,41 @@
+---
+title: Securing Cilium Gateway API
+description: 'cert-manager tutorials: Using Cilium Gateway API to solve Automatic Certificate Management Environment (ACME) challenges'
+---
+
+This tutorial will specify how to automate ingress traffic encryption to your Kubernetes cluster with `Kubernetes Gateway API`, `Cilium` and `cert-manager`.
+
+## Steps
+
+* [Step 1 - Install Helm](#step-1---install-helm)
+* [Step 2 - Deploy Kubernetes Gateway API](#step-2---deploy-kubernetes-gateway-api)
+* [Step 3 - Deploy Cilium](#step-3---deploy-cilium)
+* [Step 4 - Deploy cert-manager and Configure an Issuer](#step-4---deploy-cert-manager-and-configure-an-issuer)
+* [Step 5 - Configure a Gateway and HTTPRoute](#step-5---configure-a-gateway-and-httproute)
+
+## Step 1 - Install Helm
+
+> *Skip this step if you have helm already installed on your client.*
+
+The easiest way to install and manage `cert-manager` and `Cilium` is to use [`Helm`](https://helm.sh), a templating and deployment tool for Kubernetes resources.
+
+First, ensure the Helm client is installed on your client by following the [Helm installation instructions](https://helm.sh/docs/intro/install/).
+
+For example, on MacOS:
+
+```shell
+$ brew install helm
+```
+
+For a detailed description read the documentation provided at: https://helm.sh/docs/intro/install/
+
+## Step 2 - Deploy Kubernetes Gateway API
+
+
+
+## Step 3 - Deploy Cilium
+
+## Step 4 - Deploy cert-manager and Configure an Issuer
+
+## Step 5 - Configure a Gateway and HTTPRoute
+