buildType property
BuildType is pack — the zero-config default that detects any project — or dockerfile, the explicit escape hatch. An image app never builds.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? buildType;