Update README.md

Author: teo

coconut/README.md

@@ -172,4 +172,6 @@ As of 11/2018 InfoLogger integration is work in progress, so the best way to che
 task is with the Mesos GUI.
 On the DC/OS Vagrant test cluster, this is accessible at [http://m1.dcos/mesos/]().
 Pick the correct task by ID, Name, State, etc. and click on *Sandbox* in the rightmost column, and then open
-`stderr`.
+`stderr`.
+
+Environment teardown is also work in progress, so in the short term `pkill` will have to do.