Docs: General fixes and improvements (#662)

* Restore security docs (non-versioned), fix troubleshooting section

* Fix links in security page, add prerequisites to deploying jenkins

* Minor fixes in troubleshooting section

* Fix order of main sections

* Remove tools guide from developer guide

* Fix order of Getting Started guide parts

website/content/en/docs/Developer Guide/_index.md

@@ -1,7 +1,7 @@
 ---
 title: "Developer Guide"
 linkTitle: "Developer Guide"
-weight: 4
+weight: 5
 date: 2021-10-01
 description: >
   Jenkins Operator for developers
@@ -16,7 +16,7 @@ This document explains how to setup your development environment.
 - [operator_sdk][operator_sdk] version 1.3.0
 - [git][git_tool]
 - [go][go_tool] version 1.15.6
-- [goimports, golint, checkmake and staticcheck][install_dev_tools]
+- goimports, golint, checkmake and staticcheck
 - [minikube][minikube] version 1.21.0 (preferred Hypervisor - [virtualbox][virtualbox]) (automatically downloaded)
 - [docker][docker_tool] version 17.03+
 
@@ -326,4 +326,3 @@ It uses [cert-manager](https://cert-manager.io/) as an external dependency.
 [kubectl_tool]:https://kubernetes.io/docs/tasks/tools/install-kubectl/
 [minikube]:https://kubernetes.io/docs/tasks/tools/install-minikube/
 [virtualbox]:https://www.virtualbox.org/wiki/Downloads
-[install_dev_tools]:https://jenkinsci.github.io/kubernetes-operator/docs/developer-guide/tools/

website/content/en/docs/Developer Guide/tools.md

@@ -1,57 +0,0 @@
----
-title: "Tools"
-linkTitle: "Tools"
-weight: 30
-date: 2019-08-05
-description: >
-  Required tools for building and running Jenkins Operator
----
-
-{{% pageinfo %}}
-This document explains how to install the Go tools used by the development process.
-{{% /pageinfo %}}
-
-## Configure environment variables
-
-```bash
-export GOPATH=/home/go # example value
-export GOROOT=/usr/lib/go-1.12 # example value
-export PATH=$GOPATH/bin:$PATH
-```
-
-## goimports
-
-```
-go get golang.org/x/tools/cmd/goimports
-cd $GOPATH/src/golang.org/x/tools/cmd/goimports
-go build
-go install
-```
-
-## golint
-
-```
-go get -u golang.org/x/lint/golint
-cd  $GOPATH/src/golang.org/x/lint/golint
-go build
-go install
-```
-
-## checkmake
-```
-go get github.com/mrtazz/checkmake
-cd $GOPATH/src/github.com/mrtazz/checkmake
-go build
-go install
-```
-
-## staticcheck
-
-```
-mkdir -p $GOPATH/src/github.com/dominikh/
-cd $GOPATH/src/github.com/dominikh/
-git clone https://github.com/dominikh/go-tools.git
-cd  $GOPATH/src/github.com/dominikh/go-tools/staticcheck
-go build
-go install
-```