From f538ca2a1e69131718101c991adcea33e55f618e Mon Sep 17 00:00:00 2001
From: Brendon Duncan <brendon@bitcoin.com>
Date: Fri, 14 Sep 2018 19:12:14 +1200
Subject: [PATCH] Instructions for building.

---
 README.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/README.md b/README.md
index 75ced5808..8bfcd8c65 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,22 @@ A watch task is also available to rebuild components of the app as changes are m
 npm run watch
 ```
 
+### External Config
+When creating the production version, the build scripts expect a configuration file called `leanplum-config.json` to be in the directory that contains the project folder, with contents in the following format:
+
+```json
+{
+  "dev": {
+    "appId": "",
+    "key": ""
+  },
+  "prod": {
+    "appId": "",
+    "key": ""
+  }
+}
+```
+
 ## Testing on Real Devices
 
 It's recommended that all final testing be done on a real device – both to assess performance and to enable features that are unavailable to the emulator (e.g. a device camera).