How do I reindex solr with community edition?

When using the community edition you will need to create and configure a Controller or Endpoint that calls the `SolrIndexService.rebuildIndex()` in order to update the solr index with any changes done after startup. It is left up to the implementor to decide how to best expose this functionality.

Note: The Enterprise addition allows for a controller via the admin and will also do incremental updates whenever products and/or categories are promoted/approved.