How to update from 1.3 to 1.4 inside Docker?

[newbie]

I just installed Bagisto yesterday inside a Docker container to test if it will work for my needs, and it pulled an older version (1.33).
What is the procedure to update it to the latest version inside Docker?
Thanks

[sanjay-webkul]

Hi there,
Is it possible to share the steps which you followed for installing the bagisto?