Merge pull request #6346 from metabase/update-gitignore

update gitignore to include .DS_Store, bin/node_modules, and yarn-err…

.gitignore

@@ -50,3 +50,6 @@ bin/release/aws-eb/metabase-aws-eb.zip
 /locales/metabase-*.pot
 /stats.json
 coverage-summary.json
+.DS_Store
+bin/node_modules/
+*.log
\ No newline at end of file