fix: healthcheck (#154)

Author: dunglas

docker/php/docker-healthcheck.sh

@@ -1,11 +1,7 @@
 #!/bin/sh
 set -e
 
-export SCRIPT_NAME=/ping
-export SCRIPT_FILENAME=/ping
-export REQUEST_METHOD=GET
-
-if cgi-fcgi -bind -connect /var/run/php/php-fpm.sock; then
+if env -i REQUEST_METHOD=GET SCRIPT_NAME=/ping SCRIPT_FILENAME=/ping cgi-fcgi -bind -connect /var/run/php/php-fpm.sock; then
 	exit 0
 fi