Print the executed commands in entrypoint.sh

[refeed]

Currently it is just printing the result of the command instead of the command that being run. e.g https://github.com/refeed/zarchive-refeed/runs/7280779778?check_suite_focus=true

I think it would be better to print the commands that are being run for easier debugging.

My current idea is to add set -x in the beginning of entrypoint.sh.

[refeed]

I just remembered that we have some commands that uses the secrets directly, I am afraid those will be exposed in the logs