feat(database): add mysql support (#39)

internal/database/mysql.go

@@ -0,0 +1,14 @@
+package database
+
+import (
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+func NewMysql(dsn string) (*gorm.DB, error) {
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		return nil, err
+	}
+	return db, nil
+}