update tests instructions for common troubleshooting

Author: salonichf5

tests/README.md

@@ -11,27 +11,30 @@ This directory contains the tests for NGINX Gateway Fabric. The tests are divide
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Table of Contents
 
-- [Prerequisites](#prerequisites)
-- [Common steps for all tests](#common-steps-for-all-tests)
-  - [Step 1 - Create a Kubernetes cluster](#step-1---create-a-kubernetes-cluster)
-  - [Step 2 - Build and Load Images](#step-2---build-and-load-images)
-- [Conformance Testing](#conformance-testing)
-  - [Step 1 - Install NGINX Gateway Fabric to configured kind cluster](#step-1---install-nginx-gateway-fabric-to-configured-kind-cluster)
-    - [Option 1 - Build and install NGINX Gateway Fabric from local to configured kind cluster](#option-1---build-and-install-nginx-gateway-fabric-from-local-to-configured-kind-cluster)
-    - [Option 2 - Install NGINX Gateway Fabric from local already built image to configured kind cluster](#option-2---install-nginx-gateway-fabric-from-local-already-built-image-to-configured-kind-cluster)
-  - [Step 2 - Build conformance test runner image](#step-2---build-conformance-test-runner-image)
-  - [Step 3 - Run Gateway conformance tests](#step-3---run-gateway-conformance-tests)
-  - [Step 4 - Cleanup the conformance test fixtures and uninstall NGINX Gateway Fabric](#step-4---cleanup-the-conformance-test-fixtures-and-uninstall-nginx-gateway-fabric)
-  - [Step 5 - Revert changes to Go modules](#step-5---revert-changes-to-go-modules)
-  - [Step 6 - Delete kind cluster](#step-6---delete-kind-cluster)
-- [System Testing](#system-testing)
-  - [Logging in tests](#logging-in-tests)
-  - [Step 1 - Run the tests](#step-1---run-the-tests)
-    - [Run the functional tests locally](#run-the-functional-tests-locally)
-    - [Run the NFR tests on a GKE cluster from a GCP VM](#run-the-nfr-tests-on-a-gke-cluster-from-a-gcp-vm)
-      - [Longevity testing](#longevity-testing)
-  - [Common test amendments](#common-test-amendments)
-  - [Step 2 - Cleanup](#step-2---cleanup)
+- [NGINX Gateway Fabric Testing](#nginx-gateway-fabric-testing)
+  - [Overview](#overview)
+  - [Table of Contents](#table-of-contents)
+  - [Prerequisites](#prerequisites)
+  - [Common steps for all tests](#common-steps-for-all-tests)
+    - [Step 1 - Create a Kubernetes cluster](#step-1---create-a-kubernetes-cluster)
+    - [Step 2 - Build and Load Images](#step-2---build-and-load-images)
+  - [Conformance Testing](#conformance-testing)
+    - [Step 1 - Install NGINX Gateway Fabric to configured kind cluster](#step-1---install-nginx-gateway-fabric-to-configured-kind-cluster)
+      - [Option 1 - Build and install NGINX Gateway Fabric from local to configured kind cluster](#option-1---build-and-install-nginx-gateway-fabric-from-local-to-configured-kind-cluster)
+      - [Option 2 - Install NGINX Gateway Fabric from local already built image to configured kind cluster](#option-2---install-nginx-gateway-fabric-from-local-already-built-image-to-configured-kind-cluster)
+    - [Step 2 - Build conformance test runner image](#step-2---build-conformance-test-runner-image)
+    - [Step 3 - Run Gateway conformance tests](#step-3---run-gateway-conformance-tests)
+    - [Step 4 - Cleanup the conformance test fixtures and uninstall NGINX Gateway Fabric](#step-4---cleanup-the-conformance-test-fixtures-and-uninstall-nginx-gateway-fabric)
+    - [Step 5 - Revert changes to Go modules](#step-5---revert-changes-to-go-modules)
+    - [Step 6 - Delete kind cluster](#step-6---delete-kind-cluster)
+  - [System Testing](#system-testing)
+    - [Logging in tests](#logging-in-tests)
+    - [Step 1 - Run the tests](#step-1---run-the-tests)
+      - [Run the functional tests locally](#run-the-functional-tests-locally)
+      - [Run the NFR tests on a GKE cluster from a GCP VM](#run-the-nfr-tests-on-a-gke-cluster-from-a-gcp-vm)
+        - [Longevity testing](#longevity-testing)
+    - [Common test amendments](#common-test-amendments)
+    - [Step 2 - Cleanup](#step-2---cleanup)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->