Laravel Lumen Logging not working on production - php

Question

I have a small project on Laravel/Lumen where I use logging messages like this
Log::info('User failed to login.',
['Env token' => $this->envToken, 'Request token' =>$request->header('Authorization')]);
I can check my log in storage/logs/lumen.log just fine. The problem is when I push it to my vps where the log stops working. In there I ran composer install --no-dev to install the production dependencies only.
Is there a required dev dependency for logging or it can be something else??
More info:
Vendor/laravel/lumen-framework/config/logging.php (I haven't change it, so it's by default)
<?php
return [
/*
|--------------------------------------------------------------------------
| Default Log Channel
|--------------------------------------------------------------------------
|
| This option defines the default log channel that gets used when writing
| messages to the logs. The name specified in this option should match
| one of the channels defined in the "channels" configuration array.
|
*/
'default' => env('LOG_CHANNEL', 'stack'),
/*
|--------------------------------------------------------------------------
| Log Channels
|--------------------------------------------------------------------------
|
| Here you may configure the log channels for your application. Out of
| the box, Laravel uses the Monolog PHP logging library. This gives
| you a variety of powerful log handlers / formatters to utilize.
|
| Available Drivers: "single", "daily", "slack", "syslog",
| "errorlog", "custom", "stack"
|
*/
'channels' => [
'stack' => [
'driver' => 'stack',
'channels' => ['single'],
],
'single' => [
'driver' => 'single',
'path' => storage_path('logs/lumen.log'),
'level' => 'debug',
],
'daily' => [
'driver' => 'daily',
'path' => storage_path('logs/lumen.log'),
'level' => 'debug',
'days' => 7,
],
'slack' => [
'driver' => 'slack',
'url' => env('LOG_SLACK_WEBHOOK_URL'),
'username' => 'Lumen Log',
'emoji' => ':boom:',
'level' => 'critical',
],
'syslog' => [
'driver' => 'syslog',
'level' => 'debug',
],
'errorlog' => [
'driver' => 'errorlog',
'level' => 'debug',
],
],
];
.env file
APP_ENV=local
APP_DEBUG=true
APP_KEY=stuffkey
APP_TIMEZONE=UTC
LOG_CHANNEL=stack
LOG_SLACK_WEBHOOK_URL=
DB_CONNECTION=mysql
DB_HOST=localhost
DB_PORT=3306
DB_DATABASE=stuffdb
DB_USERNAME=stuffuser
DB_PASSWORD=stuffkey
CACHE_DRIVER=file
QUEUE_CONNECTION=sync
RESTTOKEN=blablablabla