One needs GraalVM and Maven to do the native build.
$ mvn clean package -Pnative
Results in an executable file: target/qjf-runner for your platform.
On contemporary Linux distribution, you can symlink it to your bin dir: e.g. $ ln -s /home/karm/workspaceRH/qjf/target/qjf-runner /home/karm/bin/qjf
Pipe unformatted JSON to the executable:
$ curl 'https://start.microprofile.io/api/supportMatrix' | qjf