- Adjust sample configuration file.

- Support composer for installing roundcube's dependencies (PHP + JS).

conf/install_roundcube.conf.sample

@@ -71,6 +71,9 @@ IPV6=""
 # - Directory where certificate and key for the roundcube website
 # - are stored.
 # -
+# - Example:
+# -    APACHE_CERT_DIR="/var/lib/dehydrated/certs/$WEBSITE_NAME"
+# -
 # - Defaults to
 # -    '/etc/apache2' if apache is installed from debian package system
 # -    '/usr/local/apache2/conf' otherwise
@@ -79,12 +82,18 @@ IPV6=""
 
 # - Certificate for the Rounfcube Website
 # -
+# - Example:
+# -    APACHE_SERVER_CERT="fullchain.pem"
+# -
 # - Defaults to 'server-bundle.crt'
 # -
 #APACHE_SERVER_CERT=""
 
 # - Key File for the Rounfcube Website
 # -
+# - Example:
+# -    APACHE_SERVER_KEY="privkey.pem"
+# -
 # - Defaults to 'server.key'
 # -
 #APACHE_SERVER_KEY=""
@@ -241,7 +250,7 @@ POSTFIX_DB_TYPE="pgsql"
 # -
 # -    used for setting  $config['password_db_dsn']
 # -
-POSTFIX_DB_PASSWD='CbX8vg347Vvm'
+POSTFIX_DB_PASSWD=''
 
 
 # ===