feat: add npm for js dependencies + move src/ files to root folder

- add node service in docker-compose.yml
- update .devcontainer Dockerfile by adding node, npm and vim
- init package.json for npm with tailwindcss, postcss, commitlint and commitizen as dev dependencies
- update default layout main header and footer
- replace CI's welcome_message.php with home.php listing all podcasts
- add AUTHORS.md file
- add docs folder in which to place castopod's technical documentation

app/Config/Modules.php

@@ -0,0 +1,67 @@
+<?php namespace Config;
+
+// Cannot extend BaseConfig or looping resources occurs.
+class Modules
+{
+	/*
+	 |--------------------------------------------------------------------------
+	 | Auto-Discovery Enabled?
+	 |--------------------------------------------------------------------------
+	 |
+	 | If true, then auto-discovery will happen across all elements listed in
+	 | $activeExplorers below. If false, no auto-discovery will happen at all,
+	 | giving a slight performance boost.
+	 */
+	public $enabled = true;
+
+	/*
+	 |--------------------------------------------------------------------------
+	 | Auto-Discovery Within Composer Packages Enabled?
+	 |--------------------------------------------------------------------------
+	 |
+	 | If true, then auto-discovery will happen across all namespaces loaded
+	 | by Composer, as well as the namespaces configured locally.
+	 */
+	public $discoverInComposer = true;
+
+	/*
+	|--------------------------------------------------------------------------
+	| Auto-discover Rules
+	|--------------------------------------------------------------------------
+	|
+	| Lists the aliases of all discovery classes that will be active
+	| and used during the current application request. If it is not
+	| listed here, only the base application elements will be used.
+	*/
+	public $activeExplorers = [
+		'events',
+		'registrars',
+		'routes',
+		'services',
+	];
+
+	/**
+	 * Should the application auto-discover the requested resources.
+	 *
+	 * Valid values are:
+	 *  - events
+	 *  - registrars
+	 *  - routes
+	 *  - services
+	 *
+	 * @param string $alias
+	 *
+	 * @return boolean
+	 */
+	public function shouldDiscover(string $alias)
+	{
+		if (! $this->enabled)
+		{
+			return false;
+		}
+
+		$alias = strtolower($alias);
+
+		return in_array($alias, $this->activeExplorers);
+	}
+}