Add `erlang.node` process tag
diff --git a/src/jaeger_passage_reporter.erl b/src/jaeger_passage_reporter.erl
index 053d9dc..a9cd7a1 100644
--- a/src/jaeger_passage_reporter.erl
+++ b/src/jaeger_passage_reporter.erl
@@ -182,7 +182,8 @@
           Tags0,
           #{
             ?JAEGER_CLIENT_VERSION_TAG_KEY => list_to_binary(["jaeger_passage-", Version]),
-            ?TRACER_HOSTNAME_TAG_KEY => list_to_binary(Hostname)
+            ?TRACER_HOSTNAME_TAG_KEY => list_to_binary(Hostname),
+            'erlang.node' => node()
            }),
     {ok, Socket} = gen_udp:open(0),
     State =