Fix some document titles

docs/examples/customization/configuration-snippets/README.md

@@ -1,5 +1,7 @@
+# Configuration Snippets
 
 ## Ingress
+
 The Ingress in this example adds a custom header to Nginx configuration that only applies to that specific Ingress. If you want to add headers that apply globally to all Ingresses, please have a look at [this example](/docs/examples/customization/custom-headers).
 
 ```console

docs/examples/customization/custom-configuration/README.md

@@ -1,3 +1,4 @@
+# Custom Configuration
 
 Using a [ConfigMap](https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/) is possible to customize the NGINX configuration
 

docs/examples/customization/custom-errors/README.md

@@ -1,3 +1,5 @@
+# Custom Errors
+
 This example shows how is possible to use a custom backend to render custom error pages. The code of this example is located here [custom-error-pages](https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/customization/custom-errors)
 
 

docs/examples/customization/custom-headers/README.md

@@ -1,4 +1,4 @@
-# Custom configuration
+# Custom Headers
 
 This example aims to demonstrate the deployment of an nginx ingress controller and
 use a ConfigMap to configure a custom list of headers to be passed to the upstream

docs/index.md

@@ -1,4 +1,4 @@
-# NGINX Ingress Controller
+# Welcome
 
 This is the documentation for the NGINX Ingress Controller.
 

docs/ingress-controller-catalog.md

@@ -1,4 +1,4 @@
-# Ingress controller Catalog
+# Ingress Controller Catalog
 
 This is a non-comprehensive list of existing ingress controllers.