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-rw-r--r--.env.production.sample4
1 files changed, 4 insertions, 0 deletions
diff --git a/.env.production.sample b/.env.production.sample
index 1e5ed9f3d..9de2c0650 100644
--- a/.env.production.sample
+++ b/.env.production.sample
@@ -81,6 +81,10 @@ SMTP_FROM_ADDRESS=notifications@example.com
 # PAPERCLIP_ROOT_URL=/system
 
 # Optional asset host for multi-server setups
+# The asset host must allow cross origin request from WEB_DOMAIN or LOCAL_DOMAIN
+# if WEB_DOMAIN is not set. For example, the server may have the
+# following header field:
+# Access-Control-Allow-Origin: https://example.com/
 # CDN_HOST=https://assets.example.com
 
 # S3 (optional)