Update README.md

Author: MaksymBilenko

README.md

@@ -50,6 +50,10 @@ Connect to Oracle Application Express web management console with following sett
     user: ADMIN
     password: oracle
 
+Apex upgrade up to v 5.*
+
+    docker run -it --rm --volumes-from ${DB_CONTAINER_NAME} --link ${DB_CONTAINER_NAME}:oracle-database -e PASS=YourSYSPASS sath89/apex install
+Details could be found here: https://github.com/MaksymBilenko/docker-oracle-apex
 
 **In case of any issues please post it [here](https://github.com/MaksymBilenko/docker-oracle-xe-11g/issues).**