added localhost backfiller option

docker-compose.jsonnet

@@ -62,6 +62,7 @@
   peers:: [
   ],
 
+  localhost:: "http://example.com", // the name or URL of this node as it appears in the nodes table of the database
   authentication:: true, // set to false to disable auth in thrimshim
 
   thrimbletrimmer:: true, // set to false to not have nginx serve thrimbletrimmer pages.
@@ -153,6 +154,7 @@
         "--static-nodes", std.join(",", $.peers),
         "--backdoor-port", std.toString($.backdoor_port),
         "--node-database", $.db_connect,
+        "--localhost", $.localhost
       ],
       // Mount the segments directory at /mnt
       volumes: ["%s:/mnt" % $.segments_path],