feat: warn when incorrect interface/port in use for web processes

Users that misconfigure their process's listening interface or port will now see an additional healthcheck warning for web deploys. While only a single port is checked, this ensures that users at least have some context as to why their app isn't responding as expected.

Closes #4798

plugins/scheduler-docker-local/install

@@ -17,6 +17,9 @@ trigger-scheduler-docker-local-install() {
   echo "%dokku ALL=(ALL) NOPASSWD:/usr/bin/crontab" >"/etc/sudoers.d/dokku-cron"
   chmod "0440" "/etc/sudoers.d/dokku-cron"
 
+  echo "%dokku ALL=(ALL) NOPASSWD:/usr/bin/docker-container-healthchecker" >"/etc/sudoers.d/dokku-docker-container-healthchecker"
+  chmod "0440" "/etc/sudoers.d/dokku-docker-container-healthchecker"
+
   DOKKU_PATH="$(command -v dokku)"
 
   if [[ $(systemctl 2>/dev/null) =~ -\.mount ]]; then