Add Metric entity to database schema

db/db.go

@@ -59,5 +59,6 @@ func Connect() *gorm.DB {
 	gormDB.AutoMigrate(&Type{})
 	gormDB.AutoMigrate(&Session{})
 	gormDB.AutoMigrate(&Expense{})
+	gormDB.AutoMigrate(&Metric{})
 	return newUDB
 }

db/metric.go

@@ -0,0 +1,10 @@
+package db
+
+import "gorm.io/gorm"
+
+type Metric struct {
+	gorm.Model
+	Value uint8
+	Name  string
+	Short string
+}