Added readme on how to install as a private repo

.gitignore

@@ -17,3 +17,4 @@
 examples/core/api/api
 examples/core/cron/cron
 examples/core/sqs/sqs
+.DS_Store

README.md

@@ -2,6 +2,30 @@
 A set of utilities used by our Golang projects
 * [errors](./errors/README.md)
 
+## Install this private repo
+
+Add this in your `~/.gitconfig`:
+```
+[url "ssh://git@gitlab.bob.co.za/"]
+	insteadOf = https://gitlab.bob.co.za/
+```
+
+Run this to reset the go proxy
+```
+go env -w GOPROXY=
+```
+
+Set the private go module path
+```
+go env -w GOPRIVATE=gitlab.bob.co.za:bob-public-utils/bobgroup-go-utils
+```
+
+Run this in your project to add the private module
+```
+go get gitlab.bob.co.za:bob-public-utils/bobgroup-go-utils
+```
+
+
 ## Creating a new release
 When making changes, a new release needs to be made in order to use the updated library in your project.