Add htmx security essay (#2280)

* Add htmx security essay

* Change user id prop

* Typo fixes

* More typos

* Add ruby templates and fix "use" typo

* Change paragraph structure slightly

* Rephrase JSON note

* Rephase JSON security point

* Yawar edits

* Add note about flask

www/content/essays/_index.md

@@ -28,6 +28,7 @@ page_template = "essay.html"
 ### Building Hypermedia Applications
 * [A Real World React to htmx Port](@/essays/a-real-world-react-to-htmx-port.md)
 * [Another Real World React to htmx Port](@/essays/another-real-world-react-to-htmx-port.md)
+* [Web Security Basics (with htmx)](@/essays/web-security-basics-with-htmx.md)
 * [Hypermedia-Driven Applications (HDAs)](@/essays/hypermedia-driven-applications.md)
 * [Hypermedia Friendly Scripting](@/essays/hypermedia-friendly-scripting.md)
 * [10 Tips For Building SSR/HDA applications](@/essays/10-tips-for-SSR-HDA-apps.md)