Not run process when download

Split the music downloader to two funcs # Please enter the commit message for your changes. Lines starting # with '#' will be ignored, and an empty message aborts the commit. # # On branch master # Your branch is up to date with 'origin/master'. # # Changes to be committed: # modified: deployment/docker/Dockerfile # modified: deployment/docker/start.sh # renamed: src/main.py -> src/download.py #