doc: Add sample ingress controllers page

Author: vlasebian

doc/content/the-things-stack/host/kubernetes/generic/prerequisites/_index.md

@@ -178,6 +178,8 @@ ports:
     exposedPort: 8886
 ```
 
+Examples of ingress controllers configurations can be found [here](https://www.thethingsindustries.com/docs/the-things-stack/host/kubernetes/generic/prerequisites/sample-ingress-controllers/).
+
 #### 6. TLS Certificates
 
 The Things Stack expects a [Kubernetes TLS Secret](https://kubernetes.io/docs/concepts/configuration/secret/#tls-secrets) which contains the server leaf certificates.

doc/content/the-things-stack/host/kubernetes/generic/prerequisites/sample-ingress-controllers.md

@@ -0,0 +1,168 @@
+---
+title: "Sample ingress controllers"
+description: ""
+weight: 1
+aliases: [/getting-started/kubernetes/self-managed/prerequisites/sample-ingress-controllers]
+---
+
+The following are examples of ingress controllers for {{% tts %}} deployment on Kubernetes.
+
+<!--more-->
+
+## Traefik
+
+Example of a Traefik configuration provided through the values of an Traefik Helm chart. More info about the Helm chart can be found [here](https://github.com/traefik/traefik-helm-chart).
+
+```yaml
+deployment:
+  kind: "Deployment"
+  replicas: 1
+ingressRoute:
+  dashboard:
+    enabled: false
+additionalArguments:
+- "--entrypoints.udp.udp.timeout=90s"
+- "--log.level=DEBUG"
+ports:
+  web:
+    protocol: "TCP"
+    port: 1885
+    expose:
+      default: true
+    exposedPort: 80
+    redirectTo:
+      port: "websecure"
+  websecure:
+    protocol: "TCP"
+    port: 8885
+    expose:
+      default: true
+    exposedPort: 443
+  traefik:
+    protocol: "TCP"
+    port: 9000
+    expose:
+      default: false
+  grpc:
+    protocol: "TCP"
+    port: 1884
+    expose:
+      default: true
+    exposedPort: 1884
+  grpcsecure:
+    protocol: "TCP"
+    port: 8884
+    expose:
+      default: true
+    exposedPort: 8884
+  gtwmqttv2:
+    protocol: "TCP"
+    port: 1881
+    expose:
+      default: true
+    exposedPort: 1881
+  gtwmqttv2secure:
+    protocol: "TCP"
+    port: 8881
+    expose:
+      default: true
+    exposedPort: 8881
+  gtwmqttv3:
+    protocol: "TCP"
+    port: 1882
+    expose:
+      default: true
+    exposedPort: 1882
+  gtwmqttv3secure:
+    protocol: "TCP"
+    port: 8882
+    expose:
+      default: true
+    exposedPort: 8882
+  semtechws:
+    protocol: "TCP"
+    port: 1887
+    expose:
+      default: true
+    exposedPort: 1887
+  semtechwssecure:
+    protocol: "TCP"
+    port: 8887
+    expose:
+      default: true
+    exposedPort: 8887
+  appmqtt:
+    protocol: "TCP"
+    port: 1883
+    expose:
+      default: true
+    exposedPort: 1883
+  appmqttsecure:
+    protocol: "TCP"
+    port: 8883
+    expose:
+      default: true
+    exposedPort: 8883
+  interop:
+    protocol: "TCP"
+    port: 8886
+    expose:
+      default: true
+    exposedPort: 8886
+```
+
+## Ingress NGINX
+
+Example of an Ingress NGINX configuration provided through the values of an Ingress NGINX Helm chart. More info about the 
+Helm chart can be found [here](https://artifacthub.io/packages/helm/bitnami/nginx).
+
+```yaml
+fullnameOverride: "nginx"
+namespaceOverride: "ingress-nginx"
+kind: Deployment
+replicaCount: '1'
+config:
+  log-level: "debug"
+  error-log-level: "debug"
+  # redirect port 80 to 443 for HTTP to HTTPS.
+  ssl-redirect: "true"
+  upstream-keepalive-timeout: '90s'
+service:
+  ports:
+    http: 80
+    https: 443
+  extraPorts:
+  - name: semtechws
+    port: 1887
+    targetPort: 1887
+  nodePorts:
+    tcp:
+      # http
+      "80": "1885"
+      # https
+      "443": "8885"
+      # grpc
+      "1884": "1884"
+      # grpcsecure
+      "8844": "8884"
+      # gtwmqttv2
+      "1881": "1881"
+      # gtwmqttv2secure
+      "8881": "8881"
+      # gtwmqttv3
+      "1882": "1882"
+      # gtwmqttv3secure
+      "8882": "8882"
+      # semtechws
+      "1887": "1887"
+      # semtechwssecure
+      "8887": "8887"
+      # appmqtt
+      "1883": "1883"
+      # appmqttsecure
+      "8883": "8883"
+      # interop
+      "8886": "8886"
+    udp:
+      "1700": "1700"
+```