--- /dev/null
+
+# Ignore sensitive information
+web/sites/*/settings.php
+web/sites/*/settings.local.php
+
+# Ignore Drupal's file directory
+/web/sites/*/files/
+
+# Ignore SimpleTest multi-site environment.
+web/sites/simpletest
+
+# Ignore files generated by PhpStorm
+/.idea/
+
+# Ignore sass cache
+.sass-cache/*
+web/themes/custom/yaffs/.sass-cache
+