diff --git a/manual/docker/docker-compose/ce/12.0/docker-compose.yml b/manual/docker/docker-compose/ce/12.0/docker-compose.yml
index 667982f7..eb3b60b0 100644
--- a/manual/docker/docker-compose/ce/12.0/docker-compose.yml
+++ b/manual/docker/docker-compose/ce/12.0/docker-compose.yml
@@ -32,8 +32,9 @@ services:
       - TIME_ZONE=${TIME_ZONE:-Etc/UTC}
       - SEAFILE_ADMIN_EMAIL=${SEAFILE_ADMIN_EMAIL:-me@example.com}
       - SEAFILE_ADMIN_PASSWORD=${SEAFILE_ADMIN_PASSWORD:-asecret}
-      - SEAFILE_SERVER_HOSTNAME=${SEAFILE_SERVER_HOSTNAME:-example.seafile.com}
+      - SEAFILE_SERVER_HOSTNAME=${SEAFILE_SERVER_HOSTNAME:?Variable is not set or empty}
       - SEAFILE_SERVER_PROTOCOL=${SEAFILE_SERVER_PROTOCOL:-http}
+      - SITE_ROOT=${SEAFILE_SERVER_PROTOCOL:-http}://${SEAFILE_SERVER_HOSTNAME:?Variable is not set or empty}
       - JWT_PRIVATE_KEY=${JWT_PRIVATE_KEY:?Variable is not set or empty}
       - ENABLE_SEADOC=${ENABLE_SEADOC:-false}
       - SEADOC_SERVER_URL=${SEADOC_SERVER_URL:-http://example.example.com/sdoc-server}
diff --git a/manual/docker/docker-compose/pro/12.0/docker-compose.yml b/manual/docker/docker-compose/pro/12.0/docker-compose.yml
index 55907180..e23dbc7b 100644
--- a/manual/docker/docker-compose/pro/12.0/docker-compose.yml
+++ b/manual/docker/docker-compose/pro/12.0/docker-compose.yml
@@ -50,8 +50,9 @@ services:
       - TIME_ZONE=${TIME_ZONE:-Etc/UTC}
       - SEAFILE_ADMIN_EMAIL=${SEAFILE_ADMIN_EMAIL:-me@example.com}
       - SEAFILE_ADMIN_PASSWORD=${SEAFILE_ADMIN_PASSWORD:-asecret}
-      - SEAFILE_SERVER_HOSTNAME=${SEAFILE_SERVER_HOSTNAME:-example.seafile.com}
+      - SEAFILE_SERVER_HOSTNAME=${SEAFILE_SERVER_HOSTNAME:?Variable is not set or empty}
       - SEAFILE_SERVER_PROTOCOL=${SEAFILE_SERVER_PROTOCOL:-http}
+      - SITE_ROOT=${SEAFILE_SERVER_PROTOCOL:-http}://${SEAFILE_SERVER_HOSTNAME:?Variable is not set or empty}
       - JWT_PRIVATE_KEY=${JWT_PRIVATE_KEY:?Variable is not set or empty}
       - ENABLE_SEADOC=${ENABLE_SEADOC:-false}
       - SEADOC_SERVER_URL=${SEADOC_SERVER_URL:-http://example.example.com/sdoc-server}