grammar update for stack of layers

Author: Sam Vitare

src/content/0/en/part0b.md

@@ -593,7 +593,7 @@ The status of React seems strong, but the world of JavaScript is ever-changing.
 
 What does the name of the course, <i>Full stack web development</i>, mean? Full stack is a buzzword that everyone talks about, but no one knows what it means. Or at least, there is no agreed-upon definition for the term.
 
-Practically all web applications have (at least) two "layers": the browser, being closer to the end-user, is the top layer, and the server the bottom one. There is often also a database layer below the server. We can therefore think of the <i>architecture</i> of a web application as a kind of <i>stack</i> of layers.
+Practically all web applications have (at least) two "layers": the browser, being closer to the end-user, is the top layer, and the server the bottom one. There is often also a database layer below the server. We can therefore think of the <i>architecture</i> of a web application as a <i>stack</i> of layers.
 
 Often, we also talk about the [frontend and the backend](https://en.wikipedia.org/wiki/Front_and_back_ends). The browser is the frontend, and JavaScript that runs on the browser is frontend code. The server on the other hand is the backend.