Golang explain by pointers? How it works?

Question

go

Hello, I understand what pointers are, but I don’t understand this piece of code, it seems simple, but the question arises how the entry from the config.json file appeared in the Configuration variable if we read the file into the file variable.

package Parser

import (
  "os"
  "encoding/json"
)

type Configuration struct {
  Directory string
}


func ParsConfig() *Configuration {
  file, err := os.Open("conf.json")
  if err != nil {
    panic(err)
  }
  defer file.Close()
  Configuration := &Configuration{}
    decoder := json.NewDecoder(file)
    err = decoder.Decode(Configuration)
    if err != nil {
        panic(err)
       }

return Configuration

Answer 1

how an entry from the config.json file appeared in the Configuration variable if we read the file into the file variable.

So

decoder := json.NewDecoder(file)
err = decoder.Decode(Configuration)

That is
Pointers here insofar as.