Merge pull request #4368 from esl/prod-config-changes

Adding instrumentation and prometheus to prod configuration

Author: chrzaszcz

Diff for: rel/prod.vars-toml.config

@@ -35,6 +35,10 @@
 {tls_config, "tls.verify_mode = \"none\"
   tls.certfile = \"priv/ssl/fake_server.pem\""}.
 
+{instrumentation, "[instrumentation.prometheus]
+
+[instrumentation.log]"}.
+
 {erlang_doctor_limit, 1000}.
 
 %% Include common vars shared by all profiles