Add note about instana agent

README.md

@@ -1,6 +1,6 @@
 # mina-instana
 
-Send [Mina](http://nadarei.co/mina/) deploy events to Instana.
+Send [Mina](http://nadarei.co/mina/) deploy events to [Instana](https://www.instana.com/).
 
 ![instana deploy notification started 2017-03-12 at 15 08 10](https://cloud.githubusercontent.com/assets/395132/23832516/063eab12-0736-11e7-9862-071649928131.png)
 ![instana deploy notification finished 2017-03-12 at 15 07 00](https://cloud.githubusercontent.com/assets/395132/23832517/0646b262-0736-11e7-9388-1525329ecd5c.png)
@@ -31,6 +31,8 @@ Deploy...
 
 Profit!
 
+_Note: The Instana agent should be running on the same host from where deploys are launched._
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.