diff --git a/README.md b/README.md
index 365d599..af8660a 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ First iteration is only to server files.
 To be able to extend the functionality, these files will first be served from `/f/`.
 
 The code should be written to be used as a PHP module, as well as, a separate site.
-The [Slim](https://www.slimframework.com/) provides for the latter.
+The [Slim](https://www.slimframework.com/) provides for the latter in `./demo`.
 
 The visibility of files is toggled by a file in each directory -- `.hippoacl`,
  working somewhat like a `.gitignore` file. [^1]
diff --git a/composer.json b/composer.json
index 0ceb3ad..196e71b 100644
--- a/composer.json
+++ b/composer.json
@@ -14,5 +14,9 @@
             "email": "dev@etdeboone.nl"
         }
     ],
-    "require": {}
+    "require": {},
+	"require-dev": {
+        "slim/slim": "4.*",
+        "slim/psr7": "^1.6"
+    }
 }
diff --git a/demo/.gitignore b/demo/.gitignore
new file mode 100644
index 0000000..4fbb073
--- /dev/null
+++ b/demo/.gitignore
@@ -0,0 +1,2 @@
+/vendor/
+/composer.lock
diff --git a/files/.gitignore b/demo/files/.gitignore
similarity index 100%
rename from files/.gitignore
rename to demo/files/.gitignore
diff --git a/demo/index.php b/demo/index.php
new file mode 100644
index 0000000..1358c6f
--- /dev/null
+++ b/demo/index.php
@@ -0,0 +1,22 @@
+<?php
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Slim\Factory\AppFactory;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$app = AppFactory::create();
+
+$app->addErrorMiddleware(False, False, False);
+
+$app->get('/', function (Request $request, Response $response, $args) {
+    $response->getBody()->write("Hello world!");
+    return $response;
+});
+
+$app->get('/f/{path:.*}', function (Request $request, Response $response, array $args) {
+	$response->getBody()->write("Requesting " . $args['path']);
+	return $response;
+});
+
+$app->run();