update readme

README.md

@@ -7,4 +7,6 @@
 | 3 | [CSS](3-css.md)                                  | [Download slides](3-css-slides.html)                |
 | 4 | [Bootstrap](4-bootstrap.md)                      | [Download slides](4-bootstrap-slides.html)          |
 | 5 | [JS in HTML & DOM](5-js-in-html-and-dom.md)      | [Download slides](5-js-in-html-and-dom-slides.html) |
-|   | [HTTP](2-http.md)                                | [Download slides](http-slides.html)               |
+|   | [HTTP](http.md)                                | [Download slides](http-slides.html)               |
+|   | [SQL Databases](sql-databases.md)                                | [Download slides](sql-databases-slides.html)               |
+|   | [REST Architecture](rest-architecture.md)                                | [Download slides](rest-architecture-slides.html)               |