Update Go ebook to store.openfaas.com

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

_posts/2019-02-14-serverless-single-page-app.md

@@ -217,7 +217,7 @@ Each function is automatically secured with HTTPS to encrypt traffic.
 
 ### Read the code
 
-> OpenFaaS is written in Go. Checkout my new book [Everyday Go](https://gumroad.com/l/everyday-golang) for practical tips and hands-on examples to gain experience quickly or to level-up.
+> OpenFaaS is written in Go. Checkout my new book [Everyday Go](http://store.openfaas.com/l/everyday-golang?layout=profile) for practical tips and hands-on examples to gain experience quickly or to level-up.
 
 You can find the code for all three functions in the following GitHub repo. Fork or star the repo and share with your network.
 

_posts/2019-04-10-golang-serverless.md

@@ -357,7 +357,7 @@ OpenFaaS provides a flexible templating system and build process through the use
 
 You can learn how to deploy OpenFaaS to Kubernetes and build functions and microservices using the [OpenFaaS workshop](https://github.com/openfaas/workshop/).
 
-> OpenFaaS is written in Go. Checkout my new book [Everyday Go](https://gumroad.com/l/everyday-golang) for practical tips and hands-on examples to gain experience quickly or to level-up.
+> OpenFaaS is written in Go. Checkout my new book [Everyday Go](http://store.openfaas.com/l/everyday-golang?layout=profile) for practical tips and hands-on examples to gain experience quickly or to level-up.
 
 ### Join the community
 

_posts/2021-01-31-gitea-faas.md

@@ -176,7 +176,7 @@ Once logged in, we will create a git repository so when we need to add webhooks
 
 For this guide we will be using golang for the Gitea bot, but you can use any language that you are comfortable working with.
 
-> OpenFaaS and Gitea are both written in Go. Checkout Alex's new book [Everyday Go](https://gumroad.com/l/everyday-golang) for practical tips and hands-on examples to gain experience quickly or to level-up.
+> OpenFaaS and Gitea are both written in Go. Checkout Alex's new book [Everyday Go](http://store.openfaas.com/l/everyday-golang?layout=profile) for practical tips and hands-on examples to gain experience quickly or to level-up.
 
 To get started, we'll need to pull the prebuilt OpenFaaS template, and create the skeleton of a function using `faas-cli`.
 

_posts/2022-08-08-searching-for-raspberrypi.md

@@ -432,7 +432,7 @@ Further work:
 
 * For the function to be invoked on the 10-minute schedule, you'll need to deploy the cron-connector as described in [Serverless For Everyone Else](https://openfaas.gumroad.com/l/serverless-for-everyone-else)
 * You may want to edit the "UK" filter that I added, and optionally, extend the 24 hour window. Why not read the value from [os.Getenv](https://pkg.go.dev/os) or [os.LookupEnv](https://pkg.go.dev/os) and add it to stock-finder.yml so it's easier to configure?
-* I'd also encourage you to use a database table or Redis to store which GUIDs have been alerted on or processed already. I cover how to do this in the [Premium Edition of Everyday Golang](https://gumroad.com/l/everyday-golang).
+* I'd also encourage you to use a database table or Redis to store which GUIDs have been alerted on or processed already. I cover how to do this in the [Premium Edition of Everyday Golang](http://store.openfaas.com/l/everyday-golang?layout=profile).
 * Why not figure out the vendor from the text in the URL and send along a URL to Discord, so you can get to the product page even quicker?
 
 You may also like my our work with handling events and forwarding them to Discord, or running other custom logic.

_posts/2022-10-14-access-kubernetes-from-a-function.md

@@ -193,7 +193,7 @@ functions:
       com.openfaas.serviceaccount: fn-events
 ```
 
-> If you want to learn how to build functions with Go, check out [Alex's book (Premium Edition)](https://gumroad.com/l/everyday-golang) for lots of examples.
+> If you want to learn how to build functions with Go, check out [Alex's book (Premium Edition)](http://store.openfaas.com/l/everyday-golang?layout=profile) for lots of examples.
 
 We will be using the Kubernetes client package for Go to access data and resources in the cluster. The function first creates a new clientset with an in-cluster configuration. The clientset is then used to list the events for a specific namespace.