add: readme + credits

README.md

@@ -1,24 +1,54 @@
-# README
+### What is this?
 
-This README would normally document whatever steps are necessary to get the
-application up and running.
+* Rails demo app 
+* Re: how to set up [pagy](https://github.com/ddnexus/pagy).
+* Can be used to reproduce bugs.
 
-Things you may want to cover:
+Please check out other [pagy demo apps](https://github.com/stars/benkoshy/lists/rails-demo-apps-for-pagy) if you want to see samples of how other functionality can be set up.
 
-* Ruby version
+* Rails: 8.0.0
+* Ruby: +3.2.0
+* Importmaps
+* Propshaft
 
-* System dependencies
+### Set up Instructions
 
-* Configuration
+### Choose your branch
 
-* Database creation
+* `master` - for offset pagination.
+* `keyset` - for keyset pagination.
+* `offset` - for offset based pagination.
 
-* Database initialization
+Check out the commit history, depending on the branch you choose.
 
-* How to run the test suite
+```sh
+rake db:migrate db:seed 
+```
+
+The following sets up the database, and "seeds" it - i.e. filling it with 1000s records.
+
+
+```sh
+./bin/dev
+# starts the rails server
+```
+
+Point your browser to: [http://[::1]:3000](http://[::1]:3000) and you should see pagy functioning.
+
+### License
+
+MIT
+
+### Contributing
+
+* If I've made a mistake please feel free to raise an issue. 
+
+* PRs fixing bugs or updating gems etc will be welcomed!
+
+
+### Infinite Pagination via Keyset
+
+Credit: https://youtu.be/bVvLNpJyZuw
 
-* Services (job queues, cache servers, search engines, etc.)
 
-* Deployment instructions
 
-* ...