- Add default config in etc/mantisbt/config_inc.php.ref,

- Add ssmtp program and env variable to allow mail sending,
- Add php xmlreader & xmlwriter module tu support "Import/Export issues" plugin,
- Switch to docker_tools "mixed" volume mode.

etc/mantisbt/config_inc.php.ref

@@ -0,0 +1,23 @@
+<?php
+$g_hostname                     = '${DB_HOST_NAME}';
+$g_db_type                      = 'pgsql';
+$g_database_name                = '${DB_NAME}';
+$g_db_username                  = '${DB_USER}';
+$g_db_password                  = '${DB_PASSWORD}';
+
+
+$g_default_timezone             = 'Paris';
+
+$g_crypto_master_salt           = 'SJtcO5PYJj9Y4E2RvyEiKEi1NG3pa5KUfLeA/3/hC/0=';
+
+$g_path                         = '${APPL_URL}';
+
+# --- Anonymous Access / Signup ---
+$g_allow_signup                 = OFF;
+$g_allow_anonymous_login        = OFF;
+$g_anonymous_account            = '';
+
+# --- Branding ---
+$g_window_title                 = '${WINDOW_TITLE}';
+$g_logo_image                   = 'images/${LOGO_IMG}';
+$g_favicon_image                = 'images/favicon.ico';