detect installation in a better way

rootfs/etc/confd/conf.d/config.php.toml

@@ -1,6 +0,0 @@
-[template]
-src = "config.php.tmpl"
-dest = "/var/lib/nextcloud/config/config.php.sample"
-gid = 101
-uid = 100
-mode = "0660"

rootfs/etc/confd/templates/config.php.tmpl

@@ -1,57 +0,0 @@
-<?php
-
-$CONFIG = array(
-
-'trusted_domains' =>
-  array (
-    '{{getenv "DOMAIN"}}'
-  ),
-
-'datadirectory' => '/var/lib/nextcloud/data',
-
-'dbtype' => 'pgsql',
-'dbhost' => '{{getenv "DB_HOST"}}',
-'dbname' => '{{getenv "DB_NAME"}}',
-'dbuser' => '{{getenv "DB_USER"}}',
-'dbpassword' => '{{getenv "DB_PASSWORD"}}',
-'dbtableprefix' => '{{getenv "DB_TABLE_PREFIX"}}',
-
-'skeletondirectory' => '',
-
-'mail_domain' => '{{getenv "MAIL_DOMAIN"}}',
-'mail_from_address' => '{{getenv "MAIL_FROM"}}',
-'mail_smtpdebug' => false,
-'mail_smtpmode' => 'smtp',
-'mail_smtphost' => '{{getenv "MAIL_SMTP_HOST"}}',
-'mail_smtpport' => {{getenv "MAIL_SMTP_PORT" "587"}},
-'mail_smtptimeout' => 10,
-'mail_smtpsecure' => '{{getenv "MAIL_SMTP_SECURITY" "tls"}}',
-'mail_smtpauth' => {{getenv "MAIL_SMTP_AUTH" "true"}},
-'mail_smtpauthtype' => '{{getenv "MAIL_SMTP_AUTH_TYPE" "PLAIN"}}',
-'mail_smtpname' => '{{getenv "MAIL_SMTP_NAME"}}',
-'mail_smtppassword' => '{{getenv "MAIL_SMTP_PASSWORD"}}',
-
-'overwritehost' => '{{getenv "DOMAIN"}}',
-'overwriteprotocol' => 'https',
-'overwritewebroot' => '',
-'overwrite.cli.url' => 'https://{{getenv "DOMAIN"}}',
-
-'apps_paths' => array(
-	array(
-		'path'=> '/var/lib/nextcloud/apps',
-		'url' => '/apps',
-		'writable' => true,
-	),
-),
-
-'supportedDatabases' => array(
-	'pgsql',
-),
-
-'memcache.local' => '\OC\Memcache\APCu',
-
-'assetdirectory' => '/var/lib/nextcloud',
-'mount_file' => '/var/lib/nextcloud/data/mount.json',
-'installed' => true,
-'version' => '12.0.0.29',
-);