diff --git a/app/config.docker.php b/app/config.docker.php
index 5b66bcc..1451c8a 100644
--- a/app/config.docker.php
+++ b/app/config.docker.php
@@ -1,173 +1,5 @@
 <?php
-	// *******************************************
-	// *** Database configuration (important!) ***
-	// *******************************************
 
-	define('DB_TYPE', getenv('TTRSS_DB_TYPE')); // pgsql or mysql
-	define('DB_HOST', getenv('TTRSS_DB_HOST'));
-	define('DB_USER', getenv('TTRSS_DB_USER'));
-	define('DB_NAME', getenv('TTRSS_DB_NAME'));
-	define('DB_PASS', getenv('TTRSS_DB_PASS'));
-	define('DB_PORT', getenv('TTRSS_DB_PORT')); // usually 5432 for PostgreSQL, 3306 for MySQL
-
-	define('MYSQL_CHARSET', getenv('TTRSS_MYSQL_CHARSET'));
-	// Connection charset for MySQL. If you have a legacy database and/or experience
-	// garbage unicode characters with this option, try setting it to a blank string.
-
-	// ***********************************
-	// *** Basic settings (important!) ***
-	// ***********************************
-
-	define('SELF_URL_PATH', getenv('TTRSS_SELF_URL_PATH'));
-	// This should be set to a fully qualified URL used to access
-	// your tt-rss instance over the net, such as: https://example.org/tt-rss/
-	// The value should be a constant string literal. Please don't use
-	// PHP server variables here - you might introduce security
-	// issues on your install and cause hard to debug problems.
-	// If your tt-rss instance is behind a reverse proxy, use the external URL.
-
-	define('SINGLE_USER_MODE', getenv('TTRSS_SINGLE_USER_MODE'));
-	// Operate in single user mode, disables all functionality related to
-	// multiple users and authentication. Enabling this assumes you have
-	// your tt-rss directory protected by other means (e.g. http auth).
-
-	define('SIMPLE_UPDATE_MODE', getenv('TTRSS_SIMPLE_UPDATE_MODE'));
-	// Enables fallback update mode where tt-rss tries to update feeds in
-	// background while tt-rss is open in your browser.
-	// If you don't have a lot of feeds and don't want to or can't run
-	// background processes while not running tt-rss, this method is generally
-	// viable to keep your feeds up to date.
-	// Still, there are more robust (and recommended) updating methods
-	// available, you can read about them here: https://tt-rss.org/wiki/UpdatingFeeds
-
-	// *****************************
-	// *** Files and directories ***
-	// *****************************
-
-	define('PHP_EXECUTABLE', getenv('TTRSS_PHP_EXECUTABLE'));
-	// Path to PHP *COMMAND LINE* executable, used for various command-line tt-rss
-	// programs and update daemon. Do not try to use CGI binary here, it won't work.
-	// If you see HTTP headers being displayed while running tt-rss scripts,
-	// then most probably you are using the CGI binary. If you are unsure what to
-	// put in here, ask your hosting provider.
-
-	define('LOCK_DIRECTORY', getenv('TTRSS_LOCK_DIRECTORY'));
-	// Directory for lockfiles, must be writable to the user you run
-	// daemon process or cronjobs under.
-
-	define('CACHE_DIR', getenv('TTRSS_CACHE_DIR'));
-	// Local cache directory for RSS feed content.
-
-	define('ICONS_DIR', getenv('TTRSS_ICONS_DIR'));
-	define('ICONS_URL', getenv('TTRSS_ICONS_URL'));
-	// Local and URL path to the directory, where feed favicons are stored.
-	// Unless you really know what you're doing, please keep those relative
-	// to tt-rss main directory.
-
-	// **********************
-	// *** Authentication ***
-	// **********************
-
-	// Please see PLUGINS below to configure various authentication modules.
-
-	define('AUTH_AUTO_CREATE', getenv('TTRSS_AUTH_AUTO_CREATE'));
-	// Allow authentication modules to auto-create users in tt-rss internal
-	// database when authenticated successfully.
-
-	define('AUTH_AUTO_LOGIN', getenv('TTRSS_AUTH_AUTO_LOGIN'));
-	// Automatically login user on remote or other kind of externally supplied
-	// authentication, otherwise redirect to login form as normal.
-	// If set to true, users won't be able to set application language
-	// and settings profile.
-
-	// *********************
-	// *** Feed settings ***
-	// *********************
-
-	define('FORCE_ARTICLE_PURGE', getenv('TTRSS_FORCE_ARTICLE_PURGE'));
-	// When this option is not 0, users ability to control feed purging
-	// intervals is disabled and all articles (which are not starred)
-	// older than this amount of days are purged.
-
-	// ***********************************
-	// *** Self-registrations by users ***
-	// ***********************************
-
-	define('ENABLE_REGISTRATION', getenv('TTRSS_ENABLE_REGISTRATION'));
-	// Allow users to register themselves. Please be aware that allowing
-	// random people to access your tt-rss installation is a security risk
-	// and potentially might lead to data loss or server exploit. Disabled
-	// by default.
-
-	define('REG_NOTIFY_ADDRESS', getenv('TTRSS_REG_NOTIFY_ADDRESS'));
-	// Email address to send new user notifications to.
-
-	define('REG_MAX_USERS', getenv('TTRSS_REG_MAX_USERS'));
-	// Maximum amount of users which will be allowed to register on this
-	// system. 0 - no limit.
-
-	// **********************************
-	// *** Cookies and login sessions ***
-	// **********************************
-
-	define('SESSION_COOKIE_LIFETIME', getenv('TTRSS_SESSION_COOKIE_LIFETIME'));
-	// Default lifetime of a session (e.g. login) cookie. In seconds,
-	// 0 means cookie will be deleted when browser closes.
-
-	// *********************************
-	// *** Email and digest settings ***
-	// *********************************
-
-	// Tiny Tiny RSS sends mail via PHP mail() function, unless handled
-	// by a plugin.
-
-	// If you need SMTP support, take a look here:
-	// https://git.tt-rss.org/fox/ttrss-mailer-smtp
-
-	define('SMTP_FROM_NAME', getenv('TTRSS_SMTP_FROM_NAME'));
-	define('SMTP_FROM_ADDRESS', getenv('TTRSS_SMTP_FROM_ADDRESS'));
-	// Name, address and subject for sending outgoing mail. This applies
-	// to password reset notifications, digest emails and any other mail.
-
-	define('DIGEST_SUBJECT', getenv('TTRSS_DIGEST_SUBJECT'));
-	// Subject line for email digests
-
-	// ***************************************
-	// *** Other settings (less important) ***
-	// ***************************************
-
-	define('CHECK_FOR_UPDATES', getenv('TTRSS_CHECK_FOR_UPDATES'));
-	// Check for updates automatically if running Git version
-
-	define('ENABLE_GZIP_OUTPUT', getenv('TTRSS_ENABLE_GZIP_OUTPUT'));
-	// Selectively gzip output to improve wire performance. This requires
-	// PHP Zlib extension on the server.
-	// Enabling this can break tt-rss in several httpd/php configurations,
-	// if you experience weird errors and tt-rss failing to start, blank pages
-	// after login, or content encoding errors, disable it.
-
-	define('PLUGINS', getenv('TTRSS_PLUGINS'));
-	// Comma-separated list of plugins to load automatically for all users.
-	// System plugins have to be specified here. Please enable at least one
-	// authentication plugin here (auth_*).
-	// Users may enable other user plugins from Preferences/Plugins but may not
-	// disable plugins specified in this list.
-	// Disabling auth_internal in this list would automatically disable
-	// reset password link on the login form.
-
-	define('LOG_DESTINATION', getenv('TTRSS_LOG_DESTINATION'));
-	// Error log destination to use. Possible values: sql (uses internal logging
-	// you can read in Preferences -> System), syslog - logs to system log.
-	// Setting this to blank uses PHP logging (usually to http server
-	// error.log).
-	// Note that feed updating daemons don't use this logging facility
-	// for normal output.
-
-	define('CONFIG_VERSION', getenv('TTRSS_CONFIG_VERSION'));
-	// Expected config version. Please update this option in config.php
-	// if necessary (after migrating all new options from this file).
-
-	// vim:ft=php
 	$snippets = glob(getenv("SCRIPT_ROOT")."/config.d/*.php");
 
 	foreach ($snippets as $snippet) {
diff --git a/app/config.php-config.d b/app/config.php-config.d
deleted file mode 100644
index ae7a85b..0000000
--- a/app/config.php-config.d
+++ /dev/null
@@ -1,7 +0,0 @@
-	$snippets = glob(getenv("SCRIPT_ROOT")."/config.d/*.php");
-
-	foreach ($snippets as $snippet) {
-		require_once $snippet;
-	}
-
-
diff --git a/app/config.php-dist b/app/config.php-dist
deleted file mode 100644
index eed1a69..0000000
--- a/app/config.php-dist
+++ /dev/null
@@ -1,170 +0,0 @@
-<?php
-	// *******************************************
-	// *** Database configuration (important!) ***
-	// *******************************************
-
-	define('DB_TYPE', '%DB_TYPE'); // pgsql or mysql
-	define('DB_HOST', '%DB_HOST');
-	define('DB_USER', '%DB_USER');
-	define('DB_NAME', '%DB_NAME');
-	define('DB_PASS', '%DB_PASS');
-	define('DB_PORT', '%DB_PORT'); // usually 5432 for PostgreSQL, 3306 for MySQL
-
-	define('MYSQL_CHARSET', 'UTF8');
-	// Connection charset for MySQL. If you have a legacy database and/or experience
-	// garbage unicode characters with this option, try setting it to a blank string.
-
-	// ***********************************
-	// *** Basic settings (important!) ***
-	// ***********************************
-
-	define('SELF_URL_PATH', '%SELF_URL_PATH');
-	// This should be set to a fully qualified URL used to access
-	// your tt-rss instance over the net, such as: https://example.org/tt-rss/
-	// The value should be a constant string literal. Please don't use
-	// PHP server variables here - you might introduce security
-	// issues on your install and cause hard to debug problems.
-	// If your tt-rss instance is behind a reverse proxy, use the external URL.
-
-	define('SINGLE_USER_MODE', false);
-	// Operate in single user mode, disables all functionality related to
-	// multiple users and authentication. Enabling this assumes you have
-	// your tt-rss directory protected by other means (e.g. http auth).
-
-	define('SIMPLE_UPDATE_MODE', false);
-	// Enables fallback update mode where tt-rss tries to update feeds in
-	// background while tt-rss is open in your browser.
-	// If you don't have a lot of feeds and don't want to or can't run
-	// background processes while not running tt-rss, this method is generally
-	// viable to keep your feeds up to date.
-	// Still, there are more robust (and recommended) updating methods
-	// available, you can read about them here: https://tt-rss.org/wiki/UpdatingFeeds
-
-	// *****************************
-	// *** Files and directories ***
-	// *****************************
-
-	define('PHP_EXECUTABLE', '/usr/bin/php');
-	// Path to PHP *COMMAND LINE* executable, used for various command-line tt-rss
-	// programs and update daemon. Do not try to use CGI binary here, it won't work.
-	// If you see HTTP headers being displayed while running tt-rss scripts,
-	// then most probably you are using the CGI binary. If you are unsure what to
-	// put in here, ask your hosting provider.
-
-	define('LOCK_DIRECTORY', 'lock');
-	// Directory for lockfiles, must be writable to the user you run
-	// daemon process or cronjobs under.
-
-	define('CACHE_DIR', 'cache');
-	// Local cache directory for RSS feed content.
-
-	define('ICONS_DIR', "feed-icons");
-	define('ICONS_URL', "feed-icons");
-	// Local and URL path to the directory, where feed favicons are stored.
-	// Unless you really know what you're doing, please keep those relative
-	// to tt-rss main directory.
-
-	// **********************
-	// *** Authentication ***
-	// **********************
-
-	// Please see PLUGINS below to configure various authentication modules.
-
-	define('AUTH_AUTO_CREATE', true);
-	// Allow authentication modules to auto-create users in tt-rss internal
-	// database when authenticated successfully.
-
-	define('AUTH_AUTO_LOGIN', true);
-	// Automatically login user on remote or other kind of externally supplied
-	// authentication, otherwise redirect to login form as normal.
-	// If set to true, users won't be able to set application language
-	// and settings profile.
-
-	// *********************
-	// *** Feed settings ***
-	// *********************
-
-	define('FORCE_ARTICLE_PURGE', 0);
-	// When this option is not 0, users ability to control feed purging
-	// intervals is disabled and all articles (which are not starred)
-	// older than this amount of days are purged.
-
-	// ***********************************
-	// *** Self-registrations by users ***
-	// ***********************************
-
-	define('ENABLE_REGISTRATION', false);
-	// Allow users to register themselves. Please be aware that allowing
-	// random people to access your tt-rss installation is a security risk
-	// and potentially might lead to data loss or server exploit. Disabled
-	// by default.
-
-	define('REG_NOTIFY_ADDRESS', 'user@your.domain.dom');
-	// Email address to send new user notifications to.
-
-	define('REG_MAX_USERS', 10);
-	// Maximum amount of users which will be allowed to register on this
-	// system. 0 - no limit.
-
-	// **********************************
-	// *** Cookies and login sessions ***
-	// **********************************
-
-	define('SESSION_COOKIE_LIFETIME', 86400);
-	// Default lifetime of a session (e.g. login) cookie. In seconds,
-	// 0 means cookie will be deleted when browser closes.
-
-	// *********************************
-	// *** Email and digest settings ***
-	// *********************************
-
-	// Tiny Tiny RSS sends mail via PHP mail() function, unless handled
-	// by a plugin.
-
-	// If you need SMTP support, take a look here:
-	// https://git.tt-rss.org/fox/ttrss-mailer-smtp
-
-	define('SMTP_FROM_NAME', 'Tiny Tiny RSS');
-	define('SMTP_FROM_ADDRESS', 'noreply@your.domain.dom');
-	// Name, address and subject for sending outgoing mail. This applies
-	// to password reset notifications, digest emails and any other mail.
-
-	define('DIGEST_SUBJECT', '[tt-rss] New headlines for last 24 hours');
-	// Subject line for email digests
-
-	// ***************************************
-	// *** Other settings (less important) ***
-	// ***************************************
-
-	define('CHECK_FOR_UPDATES', true);
-	// Check for updates automatically if running Git version
-
-	define('ENABLE_GZIP_OUTPUT', false);
-	// Selectively gzip output to improve wire performance. This requires
-	// PHP Zlib extension on the server.
-	// Enabling this can break tt-rss in several httpd/php configurations,
-	// if you experience weird errors and tt-rss failing to start, blank pages
-	// after login, or content encoding errors, disable it.
-
-	define('PLUGINS', 'auth_internal, note');
-	// Comma-separated list of plugins to load automatically for all users.
-	// System plugins have to be specified here. Please enable at least one
-	// authentication plugin here (auth_*).
-	// Users may enable other user plugins from Preferences/Plugins but may not
-	// disable plugins specified in this list.
-	// Disabling auth_internal in this list would automatically disable
-	// reset password link on the login form.
-
-	define('LOG_DESTINATION', 'sql');
-	// Error log destination to use. Possible values: sql (uses internal logging
-	// you can read in Preferences -> System), syslog - logs to system log.
-	// Setting this to blank uses PHP logging (usually to http server
-	// error.log).
-	// Note that feed updating daemons don't use this logging facility
-	// for normal output.
-
-	define('CONFIG_VERSION', 26);
-	// Expected config version. Please update this option in config.php
-	// if necessary (after migrating all new options from this file).
-
-	// vim:ft=php
diff --git a/app/config.php-xaccel b/app/config.php-xaccel
deleted file mode 100644
index 8b77dd0..0000000
--- a/app/config.php-xaccel
+++ /dev/null
@@ -1 +0,0 @@
-	define('NGINX_XACCEL_PREFIX', '/tt-rss');
diff --git a/app/prepare-config.php b/app/prepare-config.php
deleted file mode 100755
index 1a82ce9..0000000
--- a/app/prepare-config.php
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-
-sed -e "s/define('\([A-Z_]\+\)', [^)]\+/define('\1', getenv('TTRSS_\1')/" \
-	< config.php-dist > config.docker.php
-
-cat config.php-config.d config.php-xaccel >> config.docker.php
diff --git a/app/prepare-environment.sh b/app/prepare-environment.sh
deleted file mode 100755
index dcbb302..0000000
--- a/app/prepare-environment.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/sh
-
-grep define config.php-dist | sed -e "s/[ \t]*define('\([A-Z_]\+\)', ['\"]\?\([^'\")]\+\).*/ENV TTRSS_\1=\"\2\"/" \
-  -e 's/"false"/""/'