* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code
#649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code
#649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code
#649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code
#649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code #649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code #649
* Make watchtower skip update if pre-update lifecycle hook exits with a non-zero exit code #649
* Prevent starting new container if old one is not stopped because of lifecycle hook.
* Add null check for c.containerInfo.State in IsRunning
* Fixed that the container would not start
* Added test for preupdate
* EX_TEMPFAIL -> ExTempFail
* Added missing fuction ouput names
* Skip preupdate when container is restarting.
* Add monitor-only label
* Add tests for monitor-only
* Treat missing monitor-only label as if the option was set to false
* Add docs for container-based monitor-only
* Add function doc
* Fix monitor-only logic
