add docker commands to update on readme

README.md

@@ -67,4 +67,5 @@ After starting the container for the first time, a default administrator account
 
 *   **User/Group:** Set `PUID` and `PGID` to your user's ID on the host system. You can find them by running the commands `id -u` and `id -g`.
 *   **Data Directory:** Before the first run, create a directory for the database: `mkdir data`.
-*   **Running:** Start the container with: `PUID=$(id -u) PGID=$(id -g) docker compose up -d`
+*   **Running:** Start the container with: `PUID=$(id -u) PGID=$(id -g) docker compose up -d`
+*   **Update Sharelist:** `docker compose pull, docker compose up -d`