Most basic Heroku support

README.md

@@ -92,6 +92,10 @@ Then execute
 docker-compose build --no-cache --pull
 ```
 
+Using Heroku free tier:
+
+[Deploy to Heroku](https://heroku.com/deploy?template=https://github.com/pictuga/morss)
+
 ## Run
 
 morss will auto-detect what "mode" to use.

app.json

@@ -0,0 +1 @@
+{"stack": "container"}