update app.py

Author: hq969

myapp/app.py

@@ -0,0 +1,9 @@
+from flask import Flask
+app = Flask(__name__)
+
+@app.route("/")
+def index():
+    return "✅ Deployed Flask 3.0 App via AWS ECS + CodePipeline 🚀"
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8080)