diff --git a/etc/config.dist b/etc/config.dist
index bbf7e63..539fb95 100644
--- a/etc/config.dist
+++ b/etc/config.dist
@@ -1,20 +1,38 @@
-WEB_HTTP_PORT=81
-WEB_HTTPS_PORT=444
+# HTTP port
+WEB_HTTP_PORT=80
+# HTTPS port
+WEB_HTTPS_PORT=443
+
+# User group
+SYSTEM_USER_GROUP=webgroup
+
+# Default HTTPS certificate (Let's Encrypt)
 WEB_HTTPS_DEFAULT_CERT_PEM=/etc/letsencrypt/live/example.com/cert.pem
 WEB_HTTPS_DEFAULT_CERT_PRIVKEY=/etc/letsencrypt/live/example.com/privkey.pem
 WEB_HTTPS_DEFAULT_CERT_CHAIN=/etc/letsencrypt/live/example.com/chain.pem
 
+# The skel of the home directory
 SKEL_PATH=/etc/skel
 
+# Default user shell
 DEFAULT_SHELL=/bin/zsh
 
+# The root directory of all websites
 WEB_ROOT_PATH=/var/www/service-web/www
+
+# The directory of logs
 WEB_LOG_PATH=/services/web/logs
 
+# The path for the vhosts of Apache
 APACHE_VHOST_SITES_AVAILABLE_PATH=/etc/apache2/sites-available
 APACHE_VHOST_SITES_ENABLED_PATH=/etc/apache2/sites-enabled
 
+# The path of the php binary
 PHP_BIN=/usr/bin/php7.3
+
+# Available PHP versions
+# It's possible to add a version or remove a version
+# using the same logic
 PHP_VERSIONS="7.3 7.2 7.1 5.6"
 PHP_FPM56_POOL_PATH=/etc/php5/fpm/pool.d
 PHP_FPM71_POOL_PATH=/etc/php/7.1/fpm/pool.d
@@ -28,5 +46,3 @@ PHP_56_LABEL="PHP 5.6 (not recommended)"
 PHP_71_LABEL="PHP 7.1"
 PHP_72_LABEL="PHP 7.2"
 PHP_73_LABEL="PHP 7.3 (recommended)"
-
-SYSTEM_USER_GROUP=webgroup