chore: Updated sample application and Dockerfile for docker-php deploy config

Author: pchinthapenta

test/deploy/linux/php/docker-templates/Dockerfile

@@ -1,5 +1,5 @@
 FROM php:8.2-cli
 COPY . /usr/src/myapp
 WORKDIR /usr/src/myapp
-EXPOSE 88
+EXPOSE 80
 CMD [ "php", "index.php" ]

test/deploy/linux/php/docker-templates/index.php

@@ -5,8 +5,13 @@
 // Function to print "Hello, World!"
 function printHelloWorld() {
     echo "Hello, World!\n";
-     ob_flush();
-    flush();
+    if (extension_loaded('newrelic')) { // Ensure PHP agent is available
+        newrelic_background_job(false);
+    }
+    if (ob_get_length()) {
+        ob_flush();
+        flush();
+    }
 }
 
 // Print "Hello, World!" initially