Nasm can't create output file

[gEada]

Hello, I'm running Debian 10 on a virtual machine and I installed docker and used the nasm-gcc-container that you recommend in this link https://github.com/kellyi/nasm-gcc-container , however, I can get to the part where there's "llp@fa82417446cc:/usr/src#" on the terminal screen put when I try compile and execute a program. I'm sorry if you have nothing to do with the docker, but I want to solve this problem in order to keep studying, I've already searched on internet, but no answer for this problem on Linux.

Edit: I couldn't download the pre-configurated virtual machine because the download speed is horrible in my region and the mirror is off.

Cheers