Updated docker-wordpress readme

roles/docker-wordpress/README.md

@@ -1,12 +1,25 @@
 # role docker-wordpress
 
-## database access
+## database 
+
+## access database
 To access the database execute
 ```bash
-  docker exec -it wordpress_database_1 /bin/mysql -u wordpress -p
+  docker exec -it wordpress-database-1 /bin/mysql -u wordpress -p
 ```
+
+## upgrade database
+To upgrade the database execute
+```bash
+  docker exec -it wordpress-database-1 /bin/mysql_upgrade --user=root --password=
+```
+
+## change database root password
+- https://wolfgang.gassler.org/reset-password-mariadb-mysql-docker/
+- https://www.digitalocean.com/community/tutorials/how-to-reset-your-mysql-or-mariadb-root-password
+
 ## bash in application
-docker exec -it wordpress_application_1 /bin/sh
+docker exec -it wordpress-application-1 /bin/sh
 
 ## update wp-config.php
 ```bash