Make the licenses that we use explicit (MIT, GPL, CC-BY). (#893)

Co-authored-by: Víctor Fernández de Alba <sneridagh@gmail.com>

Author: tisto

backend/LICENSE.md

@@ -1,4 +1,4 @@
-kitconcept.voltolighttheme Copyright 2025, Plone Foundatiuon
+kitconcept.voltolighttheme Copyright 2025, kitconcept GmbH
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License version 2

docs/LICENSE

@@ -0,0 +1,40 @@
+Documentation and Design Specifications License
+================================================
+
+Copyright 2025, kitconcept GmbH
+
+Scope
+-----
+
+This license applies to:
+- All documentation prose and text in this directory
+- Design specifications and visual guidelines
+- Illustrations, diagrams, and other visual assets
+
+It does NOT apply to the source code of volto-light-theme (JavaScript,
+TypeScript, SCSS, design tokens), which is licensed under the MIT License.
+See frontend/packages/volto-light-theme/LICENSE for the software license.
+
+License
+-------
+
+Creative Commons Attribution 4.0 International (CC BY 4.0)
+
+You are free to:
+
+  Share — copy and redistribute the material in any medium or format
+  Adapt — remix, transform, and build upon the material for any purpose,
+          even commercially.
+
+Under the following terms:
+
+  Attribution — You must give appropriate credit to kitconcept GmbH,
+  provide a link to the license, and indicate if changes were made.
+  You may do so in any reasonable manner, but not in any way that
+  suggests kitconcept GmbH endorses you or your use.
+
+  No additional restrictions — You may not apply legal terms or
+  technological measures that legally restrict others from doing
+  anything the license permits.
+
+Full license text: https://creativecommons.org/licenses/by/4.0/legalcode

docs/conf.py

@@ -19,8 +19,8 @@
 # -- Project information -----------------------------------------------------
 
 project = "Volto Light Theme documentation"
-copyright = "kitconcept"
-author = "kitconcept, GmbH - VLT is an open source project created and maintained by kitconcept."
+copyright = "kitconcept GmbH"
+author = "kitconcept GmbH"
 trademark_name = "kitconcept"
 now = datetime.now()
 year = str(now.year)
@@ -118,7 +118,7 @@
 html_favicon = "_static/favicon.ico"
 html_theme_options = {
     "article_header_start": ["toggle-primary-sidebar"],
-    "extra_footer": """<p>The text and illustrations in this website are licensed by <strong>kitconcept, GmbH</strong> under a Creative Commons Attribution 4.0 International license. Plone and the Plone® logo are registered trademarks of the Plone Foundation, registered in the United States and other countries. For guidelines on the permitted uses of the Plone trademarks, see <a href="https://plone.org/foundation/logo">https://plone.org/foundation/logo</a>. All other trademarks are owned by their respective owners.</p>
+    "extra_footer": """<p>The documentation, design specifications, and visual assets on this website are licensed by kitconcept GmbH under a <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="noopener">Creative Commons Attribution 4.0 International license</a>. The source code of volto-light-theme is <a href="https://github.com/kitconcept/volto-light-theme/blob/main/frontend/packages/volto-light-theme/LICENSE" target="_blank" rel="noopener">MIT licensed</a>. Plone and the Plone® logo are registered trademarks of the Plone Foundation, registered in the United States and other countries. For guidelines on the permitted uses of the Plone trademarks, see <a href="https://plone.org/foundation/logo">https://plone.org/foundation/logo</a>. All other trademarks are owned by their respective owners.</p>
 <p>Pull request previews by <a href="https://readthedocs.org/" target="_blank">Read the Docs</a>.</p>""",
     "footer_end": ["version.html"],
     "icon_links": [

frontend/packages/volto-light-theme/src/components/Footer/slots/Copyright.tsx

@@ -47,7 +47,7 @@ const Copyright = () => {
             license: (
               <a
                 className="item"
-                href="https://www.gnu.org/licenses/old-licenses/lgpl-2.0.html"
+                href="https://www.gnu.org/licenses/old-licenses/gpl-2.0.html"
               >
                 <FormattedMessage
                   id="GNU GPL license"