small main code improve

main.go

@@ -9,7 +9,9 @@ import (
 	"backend/src/repo"
 	"backend/src/services"
 	"backend/src/utils"
+	"crypto/rsa"
 	"crypto/x509"
+	"database/sql"
 	"encoding/pem"
 	"fmt"
 	"os"
@@ -30,17 +32,22 @@ func main() {
 		panic(err)
 	}
 
+	var key *rsa.PrivateKey
+	{
 		keyRawBytes, err := os.ReadFile(conf.GetJwtSigningKey())
 		if err != nil {
 			panic(err)
 		}
 
 		keyPem, _ := pem.Decode(keyRawBytes)
-	key, err := x509.ParsePKCS1PrivateKey(keyPem.Bytes)
+		key, err = x509.ParsePKCS1PrivateKey(keyPem.Bytes)
 		if err != nil {
 			panic(err)
 		}
+	}
 
+	var sqlDb *sql.DB
+	{
 		pgConnStr := conf.GetPostgresUrl()
 		connConf, err := pgx.ParseConnectionString(pgConnStr)
 		if err != nil {
@@ -51,6 +58,7 @@ func main() {
 		if err := sqlDb.Ping(); err != nil {
 			panic(err)
 		}
+	}
 
 	jwtUtil := utils.NewJwtUtil(key)
 	passwordUtil := utils.NewPasswordUtil()