### Changes

Fixes #3: Error on DBI when files or folders contains special characters.

### Additional changes
* Added unit and feature tests
* Fix file size display
* Run tests on CI/CD
* Publish docker image on release

www/tests/Feature/Middleware/EnsureIsDbiClientTest.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Support\Facades\Storage;
+
+beforeEach(function () {
+    Storage::fake();
+});
+
+test('a DBI user-agent on the web root gets a DBI directory listing', function () {
+    Storage::put('games/game.nsp', 'data');
+
+    $response = $this->get('/', ['HTTP_USER_AGENT' => 'DBI/1.0']);
+
+    $response->assertStatus(200);
+    $response->assertHeader('Content-Type', 'text/html; charset=utf-8');
+    $response->assertSee('Index of /games/');
+});
+
+test('a non-DBI user-agent on the web root is passed through', function () {
+    $response = $this->get('/', ['HTTP_USER_AGENT' => 'Mozilla/5.0']);
+
+    // The welcome view or the next middleware handles the request (not DBI)
+    $response->assertDontSee('Index of /games/');
+});
+
+test('a DBI user-agent on an arbitrary web path gets a DBI directory listing', function () {
+    Storage::put('games/GameA/game.nsp', 'data');
+
+    $response = $this->get('/anything', ['HTTP_USER_AGENT' => 'DBI/2.5']);
+
+    $response->assertStatus(200);
+    $response->assertSee('Index of /games/');
+});