small fix

docs/running.md

@@ -26,7 +26,7 @@ db_path = "db.sqlite"
 
 [tracing]
 # otlp grpc endpoint
-endpoint = "http://localhost:4317"
+endpoint = "http://jaeger:4317"
 service_name = "lavina"
 ```
 
@@ -46,6 +46,15 @@ services:
       - '5222:5222'  # xmpp
       - '6667:6667'  # irc non-tls
       - '127.0.0.1:1380:8080' # management http (private)
+  # if you want to observe traces
+  jaeger:
+    image: "jaegertracing/all-in-one:1.56"
+    ports:
+      - "16686:16686" # web ui
+      - "4317:4317"   # grpc ingest endpoint
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+      - SPAN_STORAGE_TYPE=memory
 ```
 
 ## With Cargo