Update expired GPG key. Config options on php fpm

Change-Id: Ib40927591e04564d44dd0908b371f7ee74b8ee81
diff --git a/defaults/main.yml b/defaults/main.yml
index 79bce93..c485bf7 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -5,7 +5,19 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # PHP related settings
-php_service: "php7.4-fpm"
+
+php_version: "7.4"
+
+# FPM Config
+php_fpm_service: "php7.4-fpm"
+
+php_fpm_config:
+  pm.max_children: 15
+  pm.start_servers: 5
+  pm.min_spare_servers: 5
+  pm.max_spare_servers: 10
+  pm.max_requests: 500
+
 
 # Packages required for Wordpress and ONF Website
 php_packages: