From e8b423fb9827412c5d76d024baf22603a4247391 Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Fri, 3 Sep 2021 17:04:41 -0500
Subject: [PATCH] Docs: build config BACKEND_URL

---
 docs/development/build-config.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/development/build-config.md b/docs/development/build-config.md
index a1e331e38..fb2bd3924 100644
--- a/docs/development/build-config.md
+++ b/docs/development/build-config.md
@@ -22,6 +22,17 @@ Default: `"development"`
 
 It's recommended to always build in `"production"` mode for live sites.
 
+### `BACKEND_URL`
+
+The base URL for API calls.
+You only need to set this if Soapbox FE is hosted in a different place than the backend.
+
+Options:
+- A relative URL, eg `"/"`
+- An absolute URL, eg `"https://gleasonator.com"`
+
+Default: `"/"`
+
 ### `FE_BUILD_DIR`
 
 The folder to put build files in. This is mostly useful for CI tasks like GitLab Pages.