Finish adding note on lockfile exclusion

Author: tstirrat15

.gitignore

@@ -8,6 +8,8 @@ js-dist/src/authzedapi/authzed/api/v1alpha1
 # Because of how node's dependency management works,
 # and the fact that a lockfile in a published package
 # isn't exported, keeping these files out of the repo
-# will 
+# will make our tests reflect installed usage more closely.
 yarn.lock
 package-lock.json
+js-dist/yarn.lock
+js-dist/package-lock.json