diff --git a/manual/docker/deploy_seafile_with_docker.md b/manual/docker/deploy_seafile_with_docker.md
index bd7dabc85..3b2e76b7c 100644
--- a/manual/docker/deploy_seafile_with_docker.md
+++ b/manual/docker/deploy_seafile_with_docker.md
@@ -36,6 +36,7 @@ The following fields merit particular attention:
 - `SEAFILE_MYSQL_VOLUME`: The volume directory of MySQL data, default is `/opt/seafile-mysql/db`
 - `SEAFILE_CADDY_VOLUME`: The volume directory of Caddy data used to store certificates obtained from Let's Encrypt's, default is `/opt/seafile-caddy`
 - `SEAFILE_MYSQL_ROOT_PASSWORD`: The user `root` password of MySQL
+- `SEAFILE_MYSQL_DB_USER`: The user of MySQL (`database` - `user` can be found in `conf/seafile.conf`)
 - `SEAFILE_MYSQL_DB_PASSWORD`: The user `seafile` password of MySQL
 - `JWT`: JWT_PRIVATE_KEY, A random string with a length of no less than 32 characters, generate example: `pwgen -s 40 1`
 - `SEAFILE_SERVER_HOSTNAME`: Seafile server hostname or domain
diff --git a/manual/docker/pro-edition/deploy_seafile_pro_with_docker.md b/manual/docker/pro-edition/deploy_seafile_pro_with_docker.md
index 2567e1803..36bcc4dc7 100644
--- a/manual/docker/pro-edition/deploy_seafile_pro_with_docker.md
+++ b/manual/docker/pro-edition/deploy_seafile_pro_with_docker.md
@@ -71,6 +71,7 @@ The following fields merit particular attention:
 - `SEAFILE_CADDY_VOLUME`: The volume directory of Caddy data used to store certificates obtained from Let's Encrypt's, default is `/opt/seafile-caddy`
 - `SEAFILE_ELASTICSEARCH_VOLUME`: The volume directory of Elasticsearch data
 - `SEAFILE_MYSQL_ROOT_PASSWORD`: The `root` password of MySQL
+- `SEAFILE_MYSQL_DB_USER`: The user of MySQL (`database` - `user` can be found in `conf/seafile.conf`)
 - `SEAFILE_MYSQL_DB_PASSWORD`: The user `seafile` password of MySQL
 - `JWT`: JWT_PRIVATE_KEY, A random string with a length of no less than 32 characters, generate example: `pwgen -s 40 1`
 - `SEAFILE_SERVER_HOSTNAME`: Seafile server hostname or domain
diff --git a/manual/docker/seafile_docker_overview.md b/manual/docker/seafile_docker_overview.md
index 569963754..dedf1fcc4 100644
--- a/manual/docker/seafile_docker_overview.md
+++ b/manual/docker/seafile_docker_overview.md
@@ -1,6 +1,6 @@
 # Seafile Docker overview
 
-Seafile Docker consists of the following components:
+Seafile docker based installation consist of the following components (docker images):
 
 - Seafile server: Seafile core services, see [Seafile Components](../overview/components.md) for the details.
 - Sdoc server: SeaDoc server, provide a lightweight online collaborative document editor, see [SeaDoc](../extra_setup/setup_seadoc.md#architecture) for the details.
diff --git a/manual/images/seafile-12.0-docker-structure.png b/manual/images/seafile-12.0-docker-structure.png
index 690a14cf4..8719a7479 100644
Binary files a/manual/images/seafile-12.0-docker-structure.png and b/manual/images/seafile-12.0-docker-structure.png differ
diff --git a/manual/upgrade/upgrade_docker.md b/manual/upgrade/upgrade_docker.md
index e0a5ae68d..1d2ad3193 100644
--- a/manual/upgrade/upgrade_docker.md
+++ b/manual/upgrade/upgrade_docker.md
@@ -119,17 +119,17 @@ wget https://manual.seafile.com/docker/docker-compose/pro/12.0/caddy.yml
 
 The following fields merit particular attention:
 
-* The volume directory of Seafile data (SEAFILE_VOLUME, same as the seafile volumes in the old docker-compose.yml)
-* The volume directory of MySQL data (SEAFILE_MYSQL_VOLUME, same as the mysql volumes in the old docker-compose.yml)
-* The volume directory of Elasticsearch data (SEAFILE_ELASTICSEARCH_VOLUME, pro edition only, same as the elasticsearch volumes in the old docker-compose.yml)
-* The volume directory of Caddy data (SEAFILE_CADDY_VOLUME)
-* The user of MySQL (SEAFILE_MYSQL_DB_USER, `database` - `user` can be found in `conf/seafile.conf`)
-* The password of MySQL (SEAFILE_MYSQL_DB_PASSWORD, `database` - `password` can be found in `conf/seafile.conf`)
-* jwt (JWT_PRIVATE_KEY, A random string with a length of no less than 32 characters, generate example: `pwgen -s 40 1`)
-* SEAFILE_SERVER_HOSTNAME (SEAFILE_SERVER_HOSTNAME, same as the SEAFILE_SERVER_HOSTNAME in the old docker-compose.yml)
-* SEAFILE_SERVER_PROTOCOL (SEAFILE_SERVER_PROTOCOL, use http or https)
-
-SSL is now handled by the caddy server. If you have used SSL before, you will also need modify the seafile.nginx.conf. Change server listen 443 to 80.
+- `SEAFILE_VOLUME`: The volume directory of Seafile data, default is `/opt/seafile-data`
+- `SEAFILE_MYSQL_VOLUME`: The volume directory of MySQL data, default is `/opt/seafile-mysql/db`
+- `SEAFILE_CADDY_VOLUME`: The volume directory of Caddy data used to store certificates obtained from Let's Encrypt's, default is `/opt/seafile-caddy`
+- `SEAFILE_ELASTICSEARCH_VOLUME`: The volume directory of Elasticsearch data
+- `SEAFILE_MYSQL_ROOT_PASSWORD`: The `root` password of MySQL
+- `SEAFILE_MYSQL_DB_PASSWORD`: The user `seafile` password of MySQL
+- `JWT`: JWT_PRIVATE_KEY, A random string with a length of no less than 32 characters, generate example: `pwgen -s 40 1`
+- `SEAFILE_SERVER_HOSTNAME`: Seafile server hostname or domain
+- `SEAFILE_SERVER_PROTOCOL`: Seafile server protocol (http or https)
+
+SSL is now handled by the [caddy server](../docker/deploy_seafile_with_docker.md#about-ssl-and-caddy). If you have used SSL before, you will also need modify the seafile.nginx.conf. Change server listen 443 to 80.
 
 Backup the original seafile.nginx.conf file: