Updated the .gitignore

.gitignore

@@ -6,6 +6,9 @@ yarn-debug.log*
 yarn-error.log*
 lerna-debug.log*
 
+# Data directories
+data
+
 # Diagnostic reports (https://nodejs.org/api/report.html)
 report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json