Versions (#10597)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

docs/config.yaml

   author: The Gitea Authors
   website: https://docs.gitea.io
   version: 1.11.0
+  minGoVersion: 1.11
+  goVersion: 1.13
 
 outputs:
   home:

docs/content/doc/advanced/hacking-on-gitea.en-us.md

 on the executable path. If you don't add the go bin directory to the
 executable path you will have to manage this yourself.
 
-**Note 2**: Go version 1.11 or higher is required; however, it is important
+**Note 2**: Go version {{< min-go-version >}} or higher is required; however, it is important
 to note that our continuous integration will check that the formatting of the
 source code is not changed by `gofmt` using `make fmt-check`. Unfortunately,
 the results of `gofmt` can differ by the version of `go`. It is therefore
-recommended to install the version of go that our continuous integration is
-running. At the time of writing this is Go version 1.12; however, this can be
-checked by looking at the
-[master `.drone.yml`](https://github.com/go-gitea/gitea/blob/master/.drone.yml)
-(At the time of writing
-[line 67](https://github.com/go-gitea/gitea/blob/8917d66571a95f3da232a0c27bc1300210d10fde/.drone.yml#L67)
-is the relevant line - but this may change.)
+recommended to install the version of Go that our continuous integration is
+running. As of last update, it should be Go version {{< go-version >}}.
 
 ## Downloading and cloning the Gitea source code
 

docs/content/doc/installation/from-source.en-us.md

 on the executable path. If you don't add the go bin directory to the
 executable path, you will have to manage this yourself.
 
-**Note 2**: Go version 1.11 or higher is required. However, it is recommended to
+**Note 2**: Go version {{< min-go-version >}} or higher is required. However, it is recommended to
 obtain the same version as our continuous integration, see the advice given in
 <a href='{{< relref "doc/advanced/hacking-on-gitea.en-us.md" >}}'>Hacking on
 Gitea</a>
 
 To build from source, the following programs must be present on the system:
 
-- `go` 1.11.0 or higher, see [here](https://golang.org/dl/)
+- `go` {{< min-go-version >}} or higher, see [here](https://golang.org/dl/)
 - `node` 10.0.0 or higher with `npm`, see [here](https://nodejs.org/en/download/)
 - `make`, see <a href='{{< relref "doc/advanced/make.en-us.md" >}}'>here</a>
 
 
 The `build` target is split into two sub-targets:
 
-- `make backend` which requires [Go 1.11](https://golang.org/dl/) or greater.
+- `make backend` which requires [Go {{< min-go-version >}}](https://golang.org/dl/) or greater.
 - `make frontend` which requires [Node.js 10.0.0](https://nodejs.org/en/download/) or greater.
 
 If pre-built frontend files are present it is possible to only build the backend:

docs/content/doc/installation/from-source.zh-cn.md

 
 要从源代码进行编译，以下依赖程序必须事先安装好：
 
-- `go` 1.11.0 或以上版本, 详见 [here](https://golang.org/dl/)
+- `go` {{< min-go-version >}} 或以上版本, 详见 [here](https://golang.org/dl/)
 - `node` 10.0.0 或以上版本，并且安装 `npm`, 详见 [here](https://nodejs.org/en/download/)
 - `make`, 详见 <a href='{{< relref "make.zh-cn.md" >}}'>这里</a>
 

docs/layouts/shortcodes/go-version.html

+{{ .Site.Params.goVersion }}

docs/layouts/shortcodes/min-go-version.html

+{{ .Site.Params.minGoVersion }}