Move spec file into packaging/

This is cleaner once projects add debian and arch packaging.

Factorize the spec name/path in the Makefile.

packaging/cockpit-starter-kit.spec.in

@@ -0,0 +1,43 @@
+Name: cockpit-starter-kit
+Version: %{VERSION}
+Release: 1%{?dist}
+Summary: Cockpit Starter Kit Example Module
+License: LGPLv2+
+
+Source0: https://github.com/cockpit-project/starter-kit/releases/download/%{version}/%{name}-%{version}.tar.xz
+Source1: https://github.com/cockpit-project/starter-kit/releases/download/%{version}/%{name}-node-%{version}.tar.xz
+BuildArch: noarch
+BuildRequires:  nodejs
+BuildRequires: make
+BuildRequires: libappstream-glib
+
+Requires: cockpit-system
+
+%define debug_package %{nil}
+
+%description
+Cockpit Starter Kit Example Module
+
+%prep
+%setup -q -n %{name}
+%setup -q -a 1 -n %{name}
+
+%build
+# ignore pre-built webpack in release tarball and rebuild it
+rm -rf dist
+NODE_ENV=production make
+
+%install
+%make_install
+appstream-util validate-relax --nonet %{buildroot}/%{_datadir}/metainfo/*
+
+# drop source maps, they are large and just for debugging
+find %{buildroot}%{_datadir}/cockpit/ -name '*.map' | xargs --no-run-if-empty rm --verbose
+
+%files
+%doc README.md
+%license LICENSE dist/index.js.LICENSE.txt.gz
+%{_datadir}/cockpit/*
+%{_datadir}/metainfo/*
+
+%changelog