Disable python buffering

By default, python buffers standard output. This interacts poorly with the Huggingface logs viewer, and often results in standard output not being logged. This commit fixes this problem.

Dockerfile

@@ -25,4 +25,7 @@ WORKDIR $HOME/app
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
 
+# Disable buffering to allow logging of standard output.
+ENV PYTHONUNBUFFERED=1
+
 CMD ["python", "main.py"]