docs(go): update lang#go layer page

docs/layers/lang/go.md

@@ -10,13 +10,14 @@ description: "This layer is for golang development. It also provides additional
 - [Description](#description)
 - [Install](#install)
 - [Features](#features)
+- [Layer options](#layer-options)
 - [Key bindings](#key-bindings)
 
 <!-- vim-markdown-toc -->
 
 ## Description
 
-This layer is for golang development. It also provides additional language-specific key mappings.
+This layer is for [golang](https://go.dev/) development. It also provides additional language-specific key mappings.
 
 ## Install
 
@@ -42,6 +43,39 @@ go install github.com/jstemmer/gotags@latest
 - goto definition
 - reference finder
 
+## Layer options
+
+1. `enabled_linters`: set a list of enabled lint for golang. by default this
+   option is `['golint']`. The available linters includes: `go`, `gometalinter`
+2. go_file_head: the default file head for golang source code.
+
+```
+[layers]
+name = "lang#go"
+go_file_head = [
+    '#!/usr/bin/python3',
+    '# -*- coding : utf-8 -*-'
+    ''
+]
+```
+
+3. `go_interpreter`: Set the interpreter of go.
+
+```
+[[layers]]
+name = 'lang#go'
+go_interpreter = '~/download/bin/go'
+```
+
+4. format_on_save: enable/disable code formation when save go file. This
+   options is disabled by default, to enable it:
+
+```
+[[layers]]
+name = 'lang#go'
+format_on_save = true
+```
+
 ## Key bindings
 
 **Import key bindings:**
@@ -72,7 +106,7 @@ go install github.com/jstemmer/gotags@latest
 
 **Code formatting:**
 
-the default key bindings for formatting current buffer is `SPC b f`, and this key bindings is defined in [format layer](<>). You can also use `g=` to indent current buffer.
+the default key bindings for formatting current buffer is `SPC b f`, and this key bindings is defined in [format layer](). You can also use `g=` to indent current buffer.
 
 To make neoformat support go files, you should have [go-fmt](http://golang.org/cmd/gofmt/) command available, or
 install [goimports](https://godoc.org/golang.org/x/tools/cmd/goimports). `go-fmt` is delivered by golang's default installation, so make sure you have correctly setup your go environment.