updated the instructions

README.md

@@ -2,15 +2,31 @@
 
 This is an application to allow members of a team to get to know each other.
 
-You log in using a mozilla persona id (linked to your email address) and then you'll be presented with the list of groups you belong to.
+You log in using a mozilla persona id (linked to your email address) and then you'll be presented with the list of groups you belong to (which will be none initially).
+
+You can now create a team and invite new members to join by entering their email address (including yourself - you can administer a team without being a member).
 
 To setup your own instance on heroku:
 
     heroku apps:create
     heroku addons:add heroku-postgresql
     git push heroku master
-    heroku run db:migrate db:seed
 
-Todo:
+You should now generate a new rails secret for heroku
 
-* allow a different S3 bucket to be used
+    heroku config:add RAILS_SECRET=`rake secret`
+
+For photo storage, you will need to configure an S3 account:
+
+    heroku config:add S3_ACCESS_KEY_ID=
+    heroku config:add S3_SECRET_ACCESS_KEY=
+    heroku config:add S3_BUCKET=
+    heroku config:add S3_URL=
+
+If you want some admin users to be able to assume the identity of others:
+
+    heroku config:add OMNIPOTENT_USERS=user@domain.com
+
+If you want some email domains to be able to view teams they are not members of:
+
+    heroku config:add BLESSED_DOMAINS=domain.com