Making installation as smooth as possible

[hmltn-0]

Is your feature request related to a problem? Please describe.

I would like to make the installation of QPixel as smooth as possible so there's no barrier to contribute to development.

Describe the solution you'd like

There are two main ways. Installing packages, or using Docker. If someone is going to install packages, there should at least be a good safe way to protect that environment so you don't have to do it again, even if your code breaks and you want to start from scratch. If Docker is meant to be for convenience, perhaps some tests to ensure it works perfectly, since I think I had a few issues on it.

I am going to write details here about what it's like doing the installation in both ways, to see what could be improved.