diff --git a/README.md b/README.md
index 826af4c..8398abf 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A web-app intended to be used by canvassers campaigning for a 'Yes' vote in the second independence referendum.
 
-The web-app will be delivered to canvassers out knocking doors primarily through an HTML5/React single-page app; it's possible that someone else may do an Android of iPhone native app to address the same back end but at present I have no plans for this.
+The web-app will be delivered to canvassers out knocking doors primarily through an HTML5/React single-page app designed to work on a mobile phone; it's possible that someone else may do an Android of iPhone native app to address the same back end but at present I have no plans for this.
 
 There must also be an administrative interface through which privileged users can set the system up and authorise canvassers, and a 'followup' interface through which issue-expert specialist canvassers can address particular electors' queries.
 
@@ -23,12 +23,31 @@ You will need [Leiningen][1] 2.0 or above installed. The database required must
 [1]: https://github.com/technomancy/leiningen
 [2]: https://www.postgresql.org/
 
+You'll also need to create your own local copy of *profiles.clj*, which should contain something like:
+
+    ;; WARNING
+    ;; The profiles.clj file is used for local environment variables, such as database credentials.
+    ;; This file is listed in .gitignore and will be excluded from version control by Git.
+
+    {:profiles/dev  {:env {:database-url "jdbc:postgresql://127.0.0.1/youyesyet_dev?user=username&password=thisisnotsecure"}}
+     :profiles/test {:env {:database-url "jdbc:postgresql://127.0.0.1/youyesyet_test?user=username&password=thisisnotsecure"}}}
+
+Where *username* is the username required to access the database, and *thisisnotsecure* is the password which authenticates that username.
+
 ## Running
 
 To start a web server for the application, run:
 
     lein run
 
+If you're wanting to work on cljs development, you need two terminal sessions. In one run
+
+    lein run
+
+as above; in the other, run
+
+    lein figwheel
+
 ## License
 
 Copyright © 2016 Simon Brooke for the Radical Independence Campaign.