GCR hello app

Author: muayyad-alsadi

examples/hello-app/README.md

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+# GCR Hello App
+
+A small ~2MB image, type
+
+```
+podman-compose up
+```
+
+then open your browser on [http://localhost:8080/](http://localhost:8080/)
+

examples/hello-app/docker-compose.yaml

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+---
+version: '3'
+services:
+  web:
+    image: gcr.io/google-samples/hello-app:1.0
+    ports:
+        - "${HOST_PORT:-8080}:8080"
+