update documentation by comments (#69)

.gitignore

@@ -76,7 +76,7 @@ tags
 .history
 # End of https://www.gitignore.io/api/go,vim,emacs,visualstudiocode
 
-### JetBrains GoLand workspace ### 
+### JetBrains IDE ###
 .idea
 # End of idea tools
 

README.md

@@ -17,7 +17,7 @@ A Global Service Load Balancing solution with a focus on having cloud native qua
     - [Installation Local Playground](#installation-local-playground)
         - [Environment prerequisites](#environment-prerequisites)
         - [Running project locally](#running-project-locally)
-        - [verify installation](#verify-installation)
+        - [Verify installation](#verify-installation)
         - [Run integration tests](#run-integration-tests)
         - [Cleaning](#cleaning)
 
@@ -45,15 +45,17 @@ for customization options.
 
 #### Environment prerequisites
 
- - install **GO 1.14**
+ - [install **GO 1.14**](https://golang.org/dl/)
 
- - install **GIT**     
-    - ensure SSH key is set for your account; see https://github.com/settings/keys  
+ - [install **GIT**](https://git-scm.com/downloads)     
 
  - install **gnu-sed** if you don't have it  
-    - update $PATH in `~/.bash_profile` by sed path `export PATH=/usr/local/opt/gnu-sed/libexec/gnubin:$PATH` 
+    - If you are on a Mac, install sed by Homebrew
+    ```shell script
+    brew install gnu-sed 
+    ``` 
 
- - install **Docker**
+ - [install **Docker**](https://docs.docker.com/get-docker/)
     - ensure you are able to push/pull from your docker registry
     - to run multiple clusters reserve 8GB of memory  
 
@@ -62,13 +64,13 @@ for customization options.
         <sup>above screenshot is for <strong>Docker for Mac</strong> and that options for other Docker distributions may vary</sup>
       </div>
 
- - install **Kubectl** to operate clusters
+ - [install **Kubectl**](https://kubernetes.io/docs/tasks/tools/install-kubectl/) to operate clusters
 
  - [install **Helm3**](https://helm.sh/docs/intro/install/) to get charts
     - add default repo 
     ```shell script
-    helm repo add stable https://kubernetes-charts.storage.googleapis.com
-    ```
+    helm repo add stable https://kubernetes-charts.storage.googleapis.com
+    ``` 
 
  - install **kind** as tool for running local Kubernetes clusters
     - follow https://kind.sigs.k8s.io/docs/user/quick-start/