Update licenses check and add license for sidebar

Signed-off-by: John Kjell <[email protected]>

.github/workflows/verify-licence.yml

@@ -21,4 +21,4 @@ jobs:
       - name: Check license headers
         run: |
           set -e
-          addlicense --check -l apache -c 'The Witness Contributors' -v *
+          addlicense --check -l apache -c 'The Witness Contributors' --ignore "docs-website/**" --ignore "docs/**" -v *

sidebars.js

@@ -1,3 +1,19 @@
+/**
+ * Copyright 2024 The Witness Contributors
+ *
+ * Licensed under the Apache 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
+ *
+ *     http://www.apache.org/licenses/LICENSE-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.
+ */
+
 // @ts-check
 
 /** @type {import('@docusaurus/plugin-content-docs').SidebarsConfig} */