licenses: Add SPDX headers to the website builder and theme

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Documentation/conf.py

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: CC-BY-SA-4.0
 # -*- coding: utf-8 -*-
 #
 # Configuration file for the Sphinx documentation builder.

Documentation/theme/footer.html

@@ -1,3 +1,6 @@
+{#
+SPDX-License-Identifier: CC-BY-SA-4.0
+#}
 <footer>
   <div id="signature">
     {%- if show_copyright %}

Documentation/theme/layout.html

@@ -1,3 +1,6 @@
+{#
+SPDX-License-Identifier: CC-BY-SA-4.0
+#}
 {# TEMPLATE VAR SETTINGS #}
 {%- set url_root = pathto('', 1) %}
 {%- if url_root == '#' %}{% set url_root = '' %}{% endif %}

Documentation/theme/search.html

@@ -1,3 +1,6 @@
+{#
+SPDX-License-Identifier: CC-BY-SA-4.0
+#}
 {#
     basic/search.html
     ~~~~~~~~~~~~~~~~~

Documentation/theme/static/css/theme.css

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: CC-BY-SA-4.0 */
+
 html {
 	background-image: linear-gradient(to bottom right, #4895e1, #56c3ae);
 	background-size: cover;

Documentation/theme/theme.conf

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: CC-BY-SA-4.0
+
 [theme]
 inherit = basic
 stylesheet = css/theme.css