README: A note on embedded JS libraries

README.md

@@ -11,7 +11,7 @@ The Owl was written by Martin Mareš <mj@ucw.cz>.
 
 ## License
 
-The whole package is (c) 2020-2022 Martin Mareš.
+The whole package is (c) 2020-2023 Martin Mareš.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as
@@ -24,3 +24,13 @@ 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.
+
+## Embedded libraries
+
+Owl's repository contains embedded copies of several libraries:
+
+  - Markdown-it and KaTeX built from NPM packages and embedded in `static/bundle.js`
+    using the `js` target in top-level `Makefile`.
+
+  - Swagger in `static/swagger/`, which is an official release obtained
+    from https://github.com/swagger-api/swagger-ui/.