Agregar repositorio:
curl -L -o /tmp/lazaro-flatpak-public.asc https://carlosrm22.github.io/lazaro/lazaro-flatpak-public.asc
flatpak remote-add --user --if-not-exists --gpg-import=/tmp/lazaro-flatpak-public.asc lazaro https://carlosrm22.github.io/lazaro/
Instalar app:
flatpak install --user lazaro io.lazaro.Lazaro
Actualizar app:
flatpak update --user io.lazaro.Lazaro