feature: add LICENSE.md

LICENSE.md

+Needle is a platform dedicated to connecting people through online content sharing.
+Copyright (C) 2023 Université de Lorraine
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+The Needle Project is based on the academic work of Julien Falgas :
+<julien.falgas@univ-lorraine.fr>
+
+Julien Falgas is a lecturer at the center for research on mediations :
+<Centre de recherche sur les médiations (Crem)
+Université de Lorraine
+Ile du Saulcy
+57000 Metz>
+
+Let's weave a more human web
+<https://needle.univ-lorraine.fr>