Add license headers

Author: bzg

.gitignore

@@ -1,3 +1,7 @@
+# Copyright (c) DINUM, Bastien Guerry
+# SPDX-License-Identifier: EPL-2.0
+# License-Filename: EPL-2.0.txt
+
 *json
 *csv
 todo.org

CONTRIBUTING.md

@@ -1,3 +1,7 @@
+<!-- Copyright (c) DINUM, Bastien Guerry -->
+<!-- SPDX-License-Identifier: EPL-2.0 -->
+<!-- License-Filename: EPL-2.0.txt -->
+
 # Contributing
 
 Commit messages should be written in English.

README.md

@@ -1,3 +1,7 @@
+<!-- Copyright (c) DINUM, Bastien Guerry -->
+<!-- SPDX-License-Identifier: EPL-2.0 -->
+<!-- License-Filename: EPL-2.0.txt -->
+
 [![img](https://img.shields.io/badge/code.gouv.fr-contributif-blue.svg)](https://code.gouv.fr/documentation/#quels-degres-douverture-pour-les-codes-sources)
 [![Software License](https://img.shields.io/badge/Licence-EPL-green.svg)](https://githut.com/codegouvfr/codegouvfr-cli/tree/main/item/LICENSES/LICENSE.EPL-2.0.txt)
 

bb.edn

@@ -1,3 +1,7 @@
+;; Copyright (c) DINUM, Bastien Guerry
+;; SPDX-License-Identifier: EPL-2.0
+;; License-Filename: EPL-2.0.txt
+
 {:src   "src/codegouvfr"
  :tasks {clean
          (shell "bash -c"