change config file to be placed in home directory

Author: Sai Kiran Anagani

README.md

@@ -10,7 +10,7 @@ Requires that the record already exists in DigitalOcean's DNS.
 ```bash
 git clone https://github.com/anaganisk/digitalocean-dynamic-dns-ip.git
 ```
-create a file config.json and place it same directory as this script and add the following json
+create a file ".digitalocean-dynamic-ip.json"(dot prefix to hide the file) and place it user home directory and add the following json
 
 ```json
 {

digitalocean-dynamic-ip.go

@@ -6,8 +6,9 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
-	"path/filepath"
 	"strconv"
+
+	homedir "github.com/mitchellh/go-homedir"
 )
 
 func checkError(err error) {
@@ -37,10 +38,9 @@ type DOResponse struct {
 }
 
 func main() {
-	// load config
-	absPath, err := filepath.Abs("./config.json")
+	homeDirectory, err := homedir.Dir()
 	checkError(err)
-	getfile, err := ioutil.ReadFile(absPath)
+	getfile, err := ioutil.ReadFile(homeDirectory + "/.digitalocean-dynamic-ip.json")
 	checkError(err)
 	var config ClientConfig
 	json.Unmarshal(getfile, &config)