Config Management

จัดการ configuration ใน Go applications

Environment Variables

package main

import (
    "fmt"
    "os"
)

func main() {
    // Get environment variable
    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"  // default
    }

    // Check if set
    apiKey, exists := os.LookupEnv("API_KEY")
    if !exists {
        panic("API_KEY is required")
    }

    fmt.Println("Port:", port)
    fmt.Println("API Key:", apiKey)
}