Changing mysql user credentials in LaraDock

Hey Everyone!

Today I started working with Docker and I’m already a big fan!
Because I’m a newbie I have one problem.

So I followed the LaraDock tutorial to set up a Laravel project and run it via docker.
I also made a connection with Mysql but i’m wondering if I can change the user credentials.

I’ve been changing the Dockerfile…

ARG MYSQL_DATABASE=homestead
ARG MYSQL_USER=homestead
ARG MYSQL_PASSWORD=secret
ARG MYSQL_ROOT_PASSWORD=root

to

ARG MYSQL_DATABASE=docker
ARG MYSQL_USER=docker
ARG MYSQL_PASSWORD=secret
ARG MYSQL_ROOT_PASSWORD=root

And I have restarted nginx and mysql but without success.

I would be really grateful if someone can help me with this problem?

Thank you!

Cheers!
Yawuar