Updated example application setup docs.

home/src/main/resources/config/example.applicationSetup.n3

@@ -65,7 +65,7 @@
 # ----------------------------
 #
 # Search engine module:
-#    The Solr-based implementation is the only standard option, but it can be
+#    The Solr-based implementation is the standard option and it can be
 #    wrapped in an "instrumented" wrapper, which provides additional logging
 #    and more rigorous life-cycle checking.
 #
@@ -79,6 +79,17 @@
     a   vitroWebapp:searchengine.solr.SolrSearchEngine ,
         vitroWebapp:modules.searchEngine.SearchEngine .
 
+# Alternatively, you can setup Elasticsearch engine in the same manner:
+
+#:instrumentedSearchEngineWrapper
+#    a   vitroWebapp:searchengine.InstrumentedSearchEngineWrapper ,
+#        vitroWebapp:modules.searchEngine.SearchEngine ;
+#    :wraps :elasticSearchEngine .
+
+#:elasticSearchEngine
+#    a   vitroWebapp:searchengine.elasticsearch.ElasticSearchEngine ,
+#        vitroWebapp:modules.searchEngine.SearchEngine .
+
 # ----------------------------
 #
 # Search indexer module: