feat: Add check service (WIP)

model/status.go

@@ -6,6 +6,12 @@ import (
 	"gorm.io/gorm"
 )
 
+const (
+	StatusOK     = "ok"     // Means - response ok, service is alive
+	StatusFailed = "failed" // Means - response failed, all tries failed, service down
+	StatusWarn   = "warn"   // Means - response failed after N tries and still watched
+)
+
 type Status struct {
 	ID          int       `gorm:"primary_key;auto_increment" json:"-"`
 	ServiceID   int       `gorm:"one" json:"-"`