add community template for Meteor

Co-Authored-By: NCodeHunter <codehunter@users.noreply.github.com>

community/JavaScript/Meteor.gitignore

+# gitignore template for the Meteor framework
+# website: https://www.meteor.com/
+#
+# Recommended template: Node.gitignore
+
+# protect api keys in setting json
+settings-production.json
+settings.json
+
+# protect your mup.json settings
+mup.json
+mup.js