title: ALERT: [pool www] user has not been defined when using thecodingmachine/php:7.1-v3-fpm-node10
body: <p>i was trying lately to use thecodingmachine/php:7.1-v3-fpm-node10 image as my fpm container for local development and was surprised by this error message:</p>
  <pre><code>php-fpm_1   | [24-Sep-2020 20:05:32] ALERT: [pool www] user has not been defined
  php-fpm_1   | [24-Sep-2020 20:05:32] ALERT: [pool www] user has not been defined
  php-fpm_1   | [24-Sep-2020 20:05:32] ERROR: failed to post process the configuration
  php-fpm_1   | [24-Sep-2020 20:05:32] ERROR: failed to post process the configuration
  php-fpm_1   | [24-Sep-2020 20:05:32] ERROR: FPM initialization failed
  php-fpm_1   | [24-Sep-2020 20:05:32] ERROR: FPM initialization failed
  </code></pre>
  <p>When i looked into <code>/etc/php/7.1/fpm/pool.d/www.conf</code> i have discovered that the line with <code>user = www-data</code> is still commented, although i have absolutely no idea why. The same image worked ok a week ago.</p>
  <p>Can anyone please help me with this ?</p>