JSON from func make it global

Config.go

package models

import (
	"encoding/json"
	"io/ioutil"
)

type Config struct {
    Keywords string `json:"keywords"`
    Social   []struct {
      Url   string `json:"url"`
      Title string `json:"title"`
    } `json:"social"`
}

func Conf() Config {
	var с Config
	configFile, _ := ioutil.ReadFile("config.json")
    json.Unmarshal([]byte(configFile), &с) 
    return с
}

config.json

{
  "keywords": "keywords1",
  "social": [
    {"url": "test1", "title": "test1"},
    {"url": "test2", "title": "test2"}
  ],
  "mysql": "123123123123"
}

main.go

package main

import (
	"fmt"
	"net/http"
	"./models"
)

// Global variables
var config map[string]*models.Config

func indexHandler(w http.ResponseWriter, r *http.Request) {
  // Use config
	fmt.Println(config["Keywords"]) // Prints nil - why?
}

func main() {
	config := models.Conf()
	fmt.Println(config.Keywords) // Prints "keywords1"

	// Routes
	http.HandleFunc("/", indexHandler)

	// Get port
	http.ListenAndServe(":3000", nil)
}