diff --git a/Containerfile b/Containerfile
index a2aef35..4a13f85 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,3 +1,7 @@
 FROM php
 
-CMD php -v
+COPY index.php /app/index.php
+
+WORKDIR /app
+
+CMD php index.php
diff --git a/notes.adoc b/notes.adoc
index cb9832f..ec04b1f 100644
--- a/notes.adoc
+++ b/notes.adoc
@@ -50,3 +50,21 @@ Copyright (c) The PHP Group
 Built by https://github.com/docker-library/php
 Zend Engine v4.4.11, Copyright (c) Zend Technologies
     with Zend OPcache v8.4.11, Copyright (c), by Zend Technologies
+
+=== Building a container with code inside
+
+podman build .
+
+STEP 1/4: FROM php
+STEP 2/4: COPY index.php /app/index.php
+--> b592e9b3b69f
+STEP 3/4: WORKDIR /app
+--> 8f591440552a
+STEP 4/4: CMD php index.php
+COMMIT
+--> ec4c5890c8a7
+ec4c5890c8a75e93e1bb768f998e49ae7d2bf005e5e7c2a57dd2813b881e9758
+
+podman run --rm ec4c5890c8a7
+
+Hi, PHP Thames Valley!