Expand .gitignore for Laravel, update README with one-command setup, simplify env configs

src/app/Http/Controllers/Auth/VerifyEmailController.php

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+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Auth\Events\Verified;
+use Illuminate\Foundation\Auth\EmailVerificationRequest;
+use Illuminate\Http\RedirectResponse;
+
+class VerifyEmailController extends Controller
+{
+    /**
+     * Mark the authenticated user's email address as verified.
+     */
+    public function __invoke(EmailVerificationRequest $request): RedirectResponse
+    {
+        if ($request->user()->hasVerifiedEmail()) {
+            return redirect()->intended(route('dashboard', absolute: false).'?verified=1');
+        }
+
+        if ($request->user()->markEmailAsVerified()) {
+            event(new Verified($request->user()));
+        }
+
+        return redirect()->intended(route('dashboard', absolute: false).'?verified=1');
+    }
+}