Began introductory slides

src/slides/History.svelte

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+<section>
+    <h3>A Brief History</h3>
+    <ul>
+        <li>
+            In 2006, Eelco Dolstra conceived both the Nix expression language and package manager as
+            part of his PhD thesis “The Purely Functional Software Deployment Model”
+        </li>
+        <li>
+            Also in 2006, as part of his Master's Thesis, Armijn Hemel described NixOS, a Linux
+            distrobution based on the Nix package manager.
+        </li>
+    </ul>
+</section>
+
+<style>
+    section {
+        text-align: left;
+    }
+
+    ul {
+        font-size: 20pt;
+    }
+</style>