getting-started-rails.asciidoc in elastic-apm-2.7.0

- old
+ new

@@ -19,10 +19,10 @@
 
 Create a file `config/elastic_apm.yml`:
 
 [source,yaml]
 ----
-server_url: http://localhost:8100
+server_url: http://localhost:8200
 secret_token: ''
 ----
 
 This automatically sets up error logging and performance tracking but of course there are knobs to turn if you'd like to. See <<configuration>>.