chore: add request validations

internal/api/validator.go

@@ -0,0 +1,19 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/go-playground/validator/v10"
+	"github.com/labstack/echo/v4"
+)
+
+type CustomValidator struct {
+	validator *validator.Validate
+}
+
+func (validator *CustomValidator) Validate(i any) error {
+	if err := validator.validator.Struct(i); err != nil {
+		return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+	}
+	return nil
+}