Adopt LGPLv3 as project license

Signed-off-by: Chris Evich <cevich@redhat.com>

Containerfile

@@ -1,3 +1,19 @@
+# Rootless podman container image to run rootless GitLab Runner service.
+# Copyright (C) 2023 Christopher C. Evich
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program
+
 FROM quay.io/centos/centos:stream9
 
 ADD /setup.sh /xpackages.txt /root/