Add GoatCounter analytics

I know, it sounds horrible, but it isn't as bad as it sounds. This is a
GDPR-friendly analytics engine that respects adblockers and doesn't
store any identifying data about the page. I am using it to estimate the
visitors count of this page.

Statistics are available here:
https://share2fedi.goatcounter.com/

src/index.html

@@ -89,6 +89,11 @@
 			<section>
 				<a href="https://codeberg.org/kytta/toot">toot on Codeberg</a>
 			</section>
+			<script data-goatcounter="https://share2fedi.goatcounter.com/count"
+			        async src="//gc.zgo.at/count.js"></script>
+			<noscript>
+				<img src="https://share2fedi.goatcounter.com/count?p=/">
+			</noscript>
 		</footer>
 		<script src="/main.js"></script>
 	</body>