[Watchdog] Fix watchdog to fit non-exposed PHP

data/Dockerfiles/watchdog/watchdog.sh

@@ -187,7 +187,7 @@ phpfpm_checks() {
   while [ ${err_count} -lt ${THRESHOLD} ]; do
     host_ip=$(get_container_ip php-fpm-mailcow)
     err_c_cur=${err_count}
-    cgi-fcgi -bind -connect ${host_ip}:9000 | grep PHP 1>&2; err_count=$(( ${err_count} + ($? * 2)))
+    cgi-fcgi -bind -connect ${host_ip}:9000 | grep "Content-type" 1>&2; err_count=$(( ${err_count} + ($? * 2)))
     /usr/lib/nagios/plugins/check_ping -4 -H ${host_ip} -w 2000,10% -c 4000,100% -p2 1>&2; err_count=$(( ${err_count} + $? ))
     [ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
     [ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))

docker-compose.yml

@@ -295,7 +295,7 @@ services:
         - /lib/modules:/lib/modules:ro
 
     watchdog-mailcow:
-      image: mailcow/watchdog:1.6
+      image: mailcow/watchdog:1.7
       build: ./data/Dockerfiles/watchdog
       command: /watchdog.sh
       init: false