Merge branch 'doc-cs_severity_threshold' into 'master'

CS_REGISTRY_INSECURE documentation detail

See merge request gitlab-org/gitlab!63361

doc/user/application_security/container_scanning/index.md

@@ -175,7 +175,7 @@ You can [configure](#customizing-the-container-scanning-settings) analyzers by u
 | `CI_APPLICATION_TAG`           | `$CI_COMMIT_SHA` | Docker repository tag for the image to be scanned. | All |
 | `CS_ANALYZER_IMAGE`            | `$SECURE_ANALYZERS_PREFIX/$CS_PROJECT:$CS_MAJOR_VERSION`           | Docker image of the analyzer. | All |
 | `CS_DOCKER_INSECURE`           | `"false"`     | Allow access to secure Docker registries using HTTPS without validating the certificates. | All |
-| `CS_REGISTRY_INSECURE`         | `"false"`     | Allow access to insecure registries (HTTP only). Should only be set to `true` when testing the image locally. | All |
+| `CS_REGISTRY_INSECURE`         | `"false"`     | Allow access to insecure registries (HTTP only). Should only be set to `true` when testing the image locally. | Trivy. The registry must listen on port `80/tcp`. |
 | `CS_SEVERITY_THRESHOLD`        | `UNKNOWN`     | Severity level threshold. The scanner outputs vulnerabilities with severity level higher than or equal to this threshold. Supported levels are Unknown, Low, Medium, High, and Critical. | Trivy |
 | `DOCKER_IMAGE`                 | `$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG` | The Docker image to be scanned. If set, this variable overrides the `$CI_APPLICATION_REPOSITORY` and `$CI_APPLICATION_TAG` variables. | All |
 | `DOCKER_PASSWORD`              | `$CI_REGISTRY_PASSWORD` | Password for accessing a Docker registry requiring authentication. | All |