add details for prerequisite

docs/development.md

@@ -2,12 +2,29 @@
 
 ## How to build Kube-OVN
 
-Kube-OVN is developed by [Go](https://golang.org/) 1.15 and uses [Go Modules](https://github.com/golang/go/wiki/Modules) to manage dependency.
+##### Prerequisites:
 
-To minimize image size we use docker experiment buildx features, please enable it through the [reference](https://docs.docker.com/develop/develop-images/build_enhancements/).
+1, Kube-OVN is developed by [Go](https://golang.org/) 1.15 and uses [Go Modules](https://github.com/golang/go/wiki/Modules) to manage dependency. Make sure `GO111MODULE="on"`.
 
-We also use [gosec](https://github.com/securego/gosec) to inspects source code for security problems.
+2, We also use [gosec](https://github.com/securego/gosec) to inspects source code for security problems. 
+
+```shell
+go get github.com/securego/gosec/v2/cmd/gosec
 ```
+
+3, To minimize image size we use docker experimental buildx features. 
+
+​	For version < Docker 19.03, please enable it manually through the [reference](https://docs.docker.com/develop/develop-images/build_enhancements/). 
+
+​	For first compilation, create a new builder instance.
+
+```shell
+docker buildx create --use
+```
+
+##### Make:	
+
+```shell
 git clone https://github.com/kubeovn/kube-ovn.git
 go get -u github.com/securego/gosec/cmd/gosec
 cd kube-ovn
@@ -19,7 +36,7 @@ make release
 Kube-OVN uses [KIND](https://kind.sigs.k8s.io/) to setup a local Kubernetes cluster and [j2cli](https://github.com/kolypto/j2cli) to render template 
 and [Ginkgo](https://onsi.github.io/ginkgo/) as the test framework to run the e2e tests.
 
-```
+```shell
 go get -u github.com/onsi/ginkgo/ginkgo
 go get -u github.com/onsi/gomega/...