Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,14 +1,19 @@
 ## Prerequisites
 To contribute code changes to this project you will need the following development kits.
- * Go. [Download and install](https://golang.org/doc/install) the Go programming language
- * [docker](https://docs.docker.com/engine/installation/)
+ * [Go](https://golang.org/doc/install)
+ * [Docker](https://docs.docker.com/engine/installation/)
+ 
+As watchtower utilizes go modules for vendor locking, you'll need atleast Go 1.11.
+You can check your current version of the go language as follows:
+```bash
+  ~ $ go version
+  go version go1.12.1 darwin/amd64
+```
+
 
 ## Checking out the code
-When cloning watchtower to your development environment you should place your forked repo within the [standard go code structure](https://golang.org/doc/code.html#Organization).
+Do not place your code in the go source path.
 ```bash
-cd $GOPATH/src
-mkdir <yourfork>
-cd <yourfork>
 git clone git@github.com:<yourfork>/watchtower.git
 cd watchtower
 ```
@@ -16,9 +21,7 @@ cd watchtower
 ## Building and testing
 watchtower is a go application and is built with go commands. The following commands assume that you are at the root level of your repo.
 ```bash
-go get -u github.com/Masterminds/glide # installs glide for vendoring
-glide install                          # retrieves package dependencies
 go build                               # compiles and packages an executable binary, watchtower
-go test                                # runs tests
+go test ./... -v                       # runs tests with verbose output
 ./watchtower                           # runs the application (outside of a container)
 ```