use supervisord in image

nix/image/configs/php-fpm.conf

@@ -0,0 +1,28 @@
+[global]
+
+error_log = /proc/self/fd/2
+daemonize = no
+
+[www]
+
+access.log = /proc/self/fd/2
+
+user = haze
+group = haze
+
+listen = /var/run/php-fpm.sock
+
+listen.owner = haze
+listen.group = haze
+listen.mode = 0660
+
+pm = dynamic
+pm.max_children = 5
+pm.start_servers = 2
+pm.min_spare_servers = 1
+pm.max_spare_servers = 3
+
+clear_env = no
+
+; Ensure worker stdout and stderr are sent to the main error log.
+catch_workers_output = yes