Usar variables de env en vez de archivo json

main.go

@@ -1,11 +1,9 @@
 package main
 
 import (
-	"encoding/json"
-	"io"
 	"log"
 	"os"
-	"path"
+	"strconv"
 
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 )
@@ -18,24 +16,14 @@ type Config struct {
 func readConfig() (Config, error) {
 	config := Config{}
 
-	homeDir, err := os.UserHomeDir()
+	config.Token = os.Getenv("TELEGRAM_BOT_TOKEN")
-	if err != nil {
-		return config, err
-	}
-	pathName := path.Join(homeDir, ".config/telegram-bot-send-message.json")
 
-	file, err := os.Open(pathName)
+	var err error
-	if err != nil {
+	config.ChatId, err = strconv.ParseInt(os.Getenv("TELEGRAM_CHAT_ID"), 10, 64)
-		return config, err
-	}
-	configBytes, err := io.ReadAll(file)
-	if err != nil {
-		return config, err
-	}
-	err = json.Unmarshal(configBytes, &config)
 	if err != nil {
 		return config, err
 	}
+
 	return config, nil
 }
 

readme.md

@@ -1,18 +1,9 @@
 # telegram-bot-send-message
 
-Get token from [@BotFather](https://t.me/BotFather).
+Get token from [@BotFather](https://t.me/BotFather). Get chat id with a bot like [@getmy_idbot](https://t.me/getmy_idbot).
-
-Create config at `$HOME/telegram-bot-send-message.json`
-
-```json
-{
-  "token": "replace with token",
-  "chat_id": replace with chat id from a bot like https://t.me/getmy_idbot
-}
-```
 
 Run
 
 ```go
-telegram-bot-send-message "I hate computers."
+TELEGRAM_BOT_TOKEN=replace_with_token TELEGRAM_CHAT_ID=replace_with_chat_id telegram-bot-send-message "I hate computers."
 ```