apply geoip2, config file.

utils/config.go

@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"log"
+	"os"
+	"strings"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	Port             string
+	Geoip            string
+	CountryBlacklist []string
+}
+
+func GetConfig() *Config {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+
+	port := os.Getenv("PORT")
+	geoip_dbfile := os.Getenv("GEOIP_DB")
+	country_blacklist := os.Getenv("COUNTRY_BLACKLIST")
+
+	return &Config{
+		Port:             port,
+		Geoip:            geoip_dbfile,
+		CountryBlacklist: strings.Split(country_blacklist, ","),
+	}
+}