diff --git a/README.md b/README.md
index a03ffd0..7b9eafd 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,28 @@ make down
 make help  # View all available commands
 ```
 
+The preferred way to configure the shared footer behavior is directly in the
+WordPress theme via:
+
+- `Appearance > Customize > Footer integration`
+
+There you configure the webhook secret and optional allowlist used by WordPress
+to receive the footer artifacts pushed by the static site build.
+
+On the static-site build side, the webhook publisher is configured with runtime
+environment variables.
+
+Priority order is:
+
+1. theme configuration (`Appearance > Customize > Footer integration`)
+2. runtime environment variables for the site build webhook
+3. existing locally stored footer artifact in WordPress
+
+The site build webhook expects:
+
+- `LIBRESIGN_FOOTER_WEBHOOK_URL`
+- `LIBRESIGN_FOOTER_WEBHOOK_SECRET`
+
 You can pass component names after `make up` to start only part of the local
 stack:
 
diff --git a/site b/site
index 401b7f0..1f751f6 160000
--- a/site
+++ b/site
@@ -1 +1 @@
-Subproject commit 401b7f045163abaad7804b441ad4ee103bebd818
+Subproject commit 1f751f6e8adddf4c5accb5b04085a7308ef5379c
diff --git a/wordpress-docker b/wordpress-docker
index 2f41d9e..6053d4d 160000
--- a/wordpress-docker
+++ b/wordpress-docker
@@ -1 +1 @@
-Subproject commit 2f41d9ec5e4e896b8fab199cdccaa23f66e24d61
+Subproject commit 6053d4df9140a11cc3ab64a59c26a5ff64aa4c46