feat: complete dockerization (optional)

internal/domain/update/updateDomain.go

@@ -60,6 +60,7 @@ type UpdateStatus struct {
 	Error      *string       `json:"error"`
 	StartedAt  *time.Time    `json:"started_at"`
 	FinishedAt *time.Time    `json:"finished_at"`
+	Container  bool          `json:"container"`
 }
 
 func NewResult(release Release, checkedAt time.Time) CheckResult {