fix regex

Author: cx-david-kesoshvili

internal/commands/scan.go

@@ -2855,7 +2855,7 @@ func validateCreateScanFlags(cmd *cobra.Command) error {
 }
 
 func validateContainerImageFormat(containerImage string) error {
-	pattern := regexp.MustCompile(`^(?:[a-zA-Z0-9.-]+(?::[0-9]+)?/)?(?:[a-z0-9]+(?:[._-][a-z0-9]+)*/)*[a-z0-9]+(?:[._-][a-z0-9]+)*(?::[\w][\w.-]{0,127})?$`)
+	pattern := regexp.MustCompile(`^(?:[a-zA-Z0-9.-]+(?::[0-9]+)?/)?(?:[a-z0-9]+(?:[._-][a-z0-9]+)*/)*[a-z0-9]+(?:[._-][a-z0-9]+)*:[\w][\w.-]{0,127}$`)
 
 	matched := pattern.MatchString(containerImage)
 

internal/commands/scan_test.go

@@ -1598,6 +1598,11 @@ func TestValidateContainerImageFormat(t *testing.T) {
 			containerImage: "service.test.whatever.image:8443/service/registries:custom-value",
 			expectedError:  nil,
 		},
+		{
+			name:           "Valid container image format",
+			containerImage: "nginx",
+			expectedError:  errors.Errorf("Invalid value for --container-images flag. The value must be in the format <image-name>:<image-tag>"),
+		},
 		{
 			name:           "Missing image name",
 			containerImage: ":latest",