Fixes #398 - added environment variables section to README

README.md

@@ -11,7 +11,6 @@ This is a prototype to test a few ideas on how to gather a stream of things crea
 
 - Staging: https://network-pulse-staging.herokuapp.com
 - Work is happening in the `master` branch.
-- Relevant tickets are marked with the `v2 (upcoming)` label.
 
 ### Requirements for Development
 
@@ -26,6 +25,20 @@ This is a prototype to test a few ideas on how to gather a stream of things crea
 - `npm install`
 - `npm start`
 
+### Environment Variables
+
+#### `HOST`
+
+The host you are using. e.g., `HOST=http://localhost`
+
+#### `PORT`
+
+The port number you are using. e.g., `PORT=3000`
+
+#### `PULSE_API` (optional)
+
+URL to your local Pulse API instance (if you have one set up). e.g., `PULSE_API=http://test.example.com:8000`
+
 To set up a local instance of Pulse API, follow instructions on https://github.com/mozilla/network-pulse-api/blob/master/README.md.
 
 ## 🔷 More info
@@ -36,5 +49,3 @@ To set up a local instance of Pulse API, follow instructions on https://github.c
 ## 🔷 Contribute
 
 You can contribute by testing https://network-pulse-staging.herokuapp.com. File [issues](https://github.com/mozilla/network-pulse/issues) with bugs or suggestions. 
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