Thank you @rafalp for your quick reply. What I really want is to have full control of my forum : to be able to change html templates, modify and add new models, change views, add new functionalities, to be able to add new app, add new buttons to the editor and so on. As I said before, I can do that with Misago dev and I really appreciate your framework.
I think it is better, with missago docker, to integrate misago dev as a submodule so that people can have full control instead of importing it as an installed module. For me, I need my forum to be unique, I don't want to maintain the default misago forum.
I am a Python advocate, this is why I would like to choose forum frameworks developped with Python for my project. I plan to contribute later to your project. Congrats for this nice work.