Improve logging

[tomwassenberg]

Currently, a webhook trigger that actually results in a deploy, results in the following log output (in journald from stdout):

Mar 19 21:27:39 sadserver sudo[462]:      aas : TTY=unknown ; PWD=/var/www/aas/aas.svsticky.nl ; USER=root ; COMMAND=/usr/bin/systemd-run --no-block --property After=deploy-static-sticky.service -- systemctl start deploy-static-sticky.service
Mar 19 21:27:39 sadserver sudo[462]: pam_unix(sudo:session): session opened for user root by (uid=0)
Mar 19 21:27:39 sadserver pipenv[31706]: Running as unit: run-r062e3550f3c24bd69f37d823c54eaa70.service
Mar 19 21:27:39 sadserver sudo[462]: pam_unix(sudo:session): session closed for user root

It would be nice if all triggers are logged, in one or two lines of output, and that it would include whether the trigger resulted in a deploy or not. (Which is currently only based on the branch.)