Update free-programming-books-langs.md (#7857)

* Update free-programming-books-langs.md

* Update free-programming-books-langs.md

* Update free-programming-books-langs.md

* Update books/free-programming-books-langs.md

Co-authored-by: kalpesh <grimreaper12366@gmail.com>
Co-authored-by: Kalpesh <kalpesh.tated@jupiter.money>
Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-langs.md

@@ -102,6 +102,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
     * [Ember.js](#emberjs)
     * [Express.js](#expressjs)
     * [Fastify](#fastify)
+    * [Hydrogen](#hydrogen)  
     * [Ionic](#ionic)
     * [jQuery](#jquery)
     * [meteor](#meteor)
@@ -1244,6 +1245,11 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Fastify - Latest Documentation](https://www.fastify.io/docs/latest) (HTML)
 
 
+#### Hydrogen
+
+* [Build a Hydrogen storefront](https://shopify.dev/custom-storefronts/hydrogen/getting-started/tutorial) (HTML)
+
+
 #### Ionic
 
 * [Ionic 4 Succinctly](https://www.syncfusion.com/ebooks/ionic-4-succinctly) - Ed Freitas