Fix nginx not being able to save PID to default location

entrypoint.sh

@@ -4,4 +4,4 @@ echo "[ INFO ] Starting PHP Service"
 rc-service php-fpm7 start
 
 echo "[ INFO ] Starting nginx"
-nginx -g "daemon off;" # Foreground
+nginx -g "pid /tmp/nginx.pid; daemon off;" # Foreground