add load server settings from db module

modules/serversettings/server_settings.go

@@ -0,0 +1,40 @@
+package serversettings
+
+import (
+	"strconv"
+
+	"git.umbach.dev/app-idea/rest-api/modules/database"
+	log "github.com/sirupsen/logrus"
+)
+
+type ServerSettings struct {
+	ExpiredTime int64
+}
+
+var Settings ServerSettings
+
+func LoadServerSettings() {
+	rows, err := database.DB.Raw("SELECT name, value FROM server_settings").Rows()
+
+	if err != nil {
+		log.Fatal("Failed to load server settings:", err)
+	}
+
+	defer rows.Close()
+
+	var (
+		name  string
+		value string
+	)
+
+	for rows.Next() {
+		rows.Scan(&name, &value)
+		log.Infoln(name, value)
+
+		switch name {
+		case "expired_time":
+			n, _ := strconv.ParseInt(value, 0, 64)
+			Settings.ExpiredTime = n
+		}
+	}
+}