Add license header to all files

Change-Id: I24c88325af067ecd2442c10b8818a59273a07ff5
Gitlab: #45
diff --git a/client/src/setupTests.js b/client/src/setupTests.js
index 74b1a27..e6d471e 100644
--- a/client/src/setupTests.js
+++ b/client/src/setupTests.js
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * 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
+ * <https://www.gnu.org/licenses/>.
+ */
 // jest-dom adds custom jest matchers for asserting on DOM nodes.
 // allows you to do things like:
 // expect(element).toHaveTextContent(/react/i)