only open port after init.sql is done

[simon998yang]

Hi,

First thanks for the great work. It works just nice for me. But I run into problem when I integrate this image with my app with docker-compose. I use wait-for to scan the database port in the web server to determine whether the database is ready and then start my app.

Because init.sql would take some time to finish, i run into "ORACLE initialization or shutdown in progress " problem. Ideally should only open the port after the init.sql is done.