update README

README.md

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 # SnipSnap
 
-A simple but powerful tool to make your images prettier.
+A simple but powerful tool to make your screenshots prettier.
+
+![App preview](./src/images/preview.png)
+
+## Motivation
+
+I built SnipSnap because I wasn't happy with the other options as they were either in the browser or needed to be used as your primary screenshot tool. I use [Cleanshot](https://cleanshot.com/) and SnipSnap fits into that workflow perfectly.
+
+I've also always wanted to build a desktop app and this idea kinda let me do that while trying a few new technologies which I hadn't done in a while.
+
+## Technologies
+
+- [Tauri](https://tauri.app/)
+- [Mantine](https://mantine.dev/)
+
+## Notes
+
+- I've personally only tested the application on MacOS. I think everything should work fine on both Linux and Windows? It'd be great if someone could test it out and let me know!
+
+## Contributing
+
+A `CONTRIBUTION.md` file is coming soon but feel free to create an issue with your suggestion/bug report before working on a PR.