Add copyright to Debian package

packaging/debian/copyright

@@ -0,0 +1,28 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: lume
+Source: https://git.kill0.net/chill9/lume
+
+Files: *
+Copyright: 2021 Ryan Cavicchioni <ryan@cavi.cc>
+License: MPL-2.0
+
+License: MPL-2.0
+ Licensed under the Mozilla Public License License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.  You may
+ obtain a copy of the License at
+ .
+ https://www.mozilla.org/en-US/MPL/2.0/
+ .
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ .
+ On Debian systems, the complete text of the Mozilla Public License version 2.0
+ license can be found in "/usr/share/common-licenses/MPL-2.0".
+
+# Please also look if there are files or directories which have a
+# different copyright/license attached and list them here.
+# Please avoid picking licenses with terms that are more restrictive than the
+# packaged work, as it may make Debian's contributions unacceptable upstream.