You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: proxy_code.go
    path of file: ./repos/rclone/cmd/serve/servetest
    
    the code of the file until where you have to start completion: //go:build ignore
// +build ignore

// A simple auth proxy for testing purposes
package main

import (
	"encoding/json"
	"log"
	"os"
)

func main() {
	if len(os.Args) < 2 {
		log.Fatalf("Syntax: %s <root>", os.Args[0])
	}
	root := o
    
func main() {
	if len(os.Args) < 2 {
		log.Fatalf("Syntax: %s <root>", os.Args[0])
	}
	root := os.Args[1]

	// Read the input
	var in map[string]string
	err := json.NewDecoder(os.Stdin).Decode(&in)
	if err != nil {
		log.Fatal(err)
	}

	// Write the output
	var out = map[string]string{
		"type":     "local",
		"_root":    root,
		"_obscure": "pass",
	}
	json.NewEncoder(os.Stdout).Encode(&out)
	if err != nil {
		log.Fatal(err)
	}
}