Issue on Ubuntu 18.04

[szvasas]

Hi @MaksymBilenko,

Thank you for creating this docker image, it is really useful for our testing!
I am using it on MacOS and Ubuntu 16.04 without any problems but it seems to have an issue I cannot resolve on Ubuntu 18.04.
When I start up the container everything seems to be fine, the docker logs gives the following:

Database not initialized. Initializing database.
Setting up:
processes=500
sessions=555
transactions=610
If you want to use different parameters set processes, sessions, transactions env variables and consider this formula:
processes=x
sessions=x*1.1+5
transactions=sessions*1.1

Oracle Database 11g Express Edition Configuration
-------------------------------------------------
This will configure on-boot properties of Oracle Database 11g Express 
Edition.  The following questions will determine whether the database should 
be starting upon system boot, the ports it will use, and the passwords that 
will be used for database accounts.  Press <Enter> to accept the defaults. 
Ctrl-C will abort.

Specify the HTTP port that will be used for Oracle Application Express [8080]:
Specify a port that will be used for the database listener [1521]:
Specify a password to be used for database accounts.  Note that the same
password will be used for SYS and SYSTEM.  Oracle recommends the use of 
different passwords for each database account.  This can be done after 
initial configuration:
Confirm the password:

Do you want Oracle Database 11g Express Edition to be started on boot (y/n) [y]:
Starting Oracle Net Listener...Done
Configuring database...Done
Starting Oracle Database 11g Express Edition instance...Done
Installation completed successfully.
Setting sys/system passwords
Database initialized. Please visit http://#containeer:8080/apex to proceed with configuration
Oracle Database 11g Express Edition instance is already started

Starting import scripts from '/docker-entrypoint-initdb.d':
/entrypoint.sh: line 108: /docker-entrypoint-initdb.d/.cache: No such file or directory
/entrypoint.sh: line 109: /docker-entrypoint-initdb.d/.cache: No such file or directory
/entrypoint.sh: line 110: /docker-entrypoint-initdb.d/.cache: No such file or directory
Import finished

Database ready to use. Enjoy! ;)

But when I try to connect to it I get this error:

Listener refused the connection with the following error:
ORA-12528, TNS:listener: all appropriate instances are blocking new connections

Have you experienced a similar issue on your side as well?

Thanks,
Szabolcs