Docs: update docs sections from README

docs/development/how-it-works.md

@@ -5,4 +5,20 @@ Soapbox FE is a [single-page application (SPA)](https://en.wikipedia.org/wiki/Si
 It has a single HTML file, `index.html`, responsible only for loading the required JavaScript and CSS.
 It interacts with the backend through [XMLHttpRequest (XHR)](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest).
 
-It incorporates much of the [Mastodon API](https://docs.joinmastodon.org/methods/) used by Pleroma and Mastodon, but requires many [Pleroma-specific features](https://docs-develop.pleroma.social/backend/API/differences_in_mastoapi_responses/) in order to function.
+Here is a simplified example with Nginx:
+
+```nginx
+location /api {
+  proxy_pass http://backend;
+}
+
+location / {
+  root /opt/soapbox;
+  try_files $uri index.html;
+}
+```
+
+(See [`mastodon.conf`](https://gitlab.com/soapbox-pub/soapbox-fe/-/blob/develop/installation/mastodon.conf) for a full example.)
+
+Soapbox incorporates much of the [Mastodon API](https://docs.joinmastodon.org/methods/), [Pleroma API](https://api.pleroma.social/), and more.
+It detects features supported by the backend to provide the right experience for the backend.