[FEAT] Generate configuration templates

[taos15]

Is this a new feature request?

• I have searched the existing issues

Wanted change

As a system admin
I want configuration templates to be generated when the install the application
So that I can use them as refereces to futher modufy the application

Reason for change

Scenario 1:

• Given I am a system admin
  • And want to add a services like redis. I need to go the the documentation to build the configuration

Scenario 2:

• Given I am a system admin
  • And want to tune the server. I want to be able to see the default config use during the intalation script

Proposed code change

I propose to:

• Create someConfig.sample.config.php with the most used configutaions (databases, redis cache, imaginary, etc) as well as the template of the initail config , so we see what values were used during the instalation. Multi-files configuration are prefered
• A add logic to the templates be able to rename the *conf.example.php based on enviropment variables.

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[taos15]

Here is an example of how a redis config might look. Open for suggestions.

// redis.config.php

<?php
$rdHost = getenv('RDHOST');
if ($rdHost !== false) {
  $CONFIG = array(
    'memcache.local' => '\\OC\\Memcache\\APCu',
    'memcache.distributed' => '\\OC\\Memcache\\Redis',
    'filelocking.enabled' => true,
    'memcache.locking' => '\\OC\\Memcache\\Redis',
    'redis' => array(
      'host' => $rdHost,
      'port' => getenv('RDPORT'),
      'timeout' => 0.0,
      'password' => getenv('RDPASS'), // Optional, if not defined no password will be used.
    ),
  );
}

[LinuxServer-CI]

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[github-actions]

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