Add development instructions

README.md

@@ -1,2 +1,26 @@
-# mackorone-playlist-pr-bot
+# playlist-entry-validator
-GitHub bot that automatically verifies PRs with new playlist entries
+
+GitHub bot that automatically verifies pull requests with new playlist entries for [spotify-playlist-archive](https://github.com/mackorone/spotify-playlist-archive) repo.
+
+## Development
+
+### Prerequisites
+
+- Node.js version 18 or later
+
+### Setup
+
+(You only need to do this once)
+
+1. Fork and clone the repo. Then open your command line, `cd` into the project's directory, and run `npm install`
+2. Follow [this guide](https://probot.github.io/docs/development/#manually-configuring-a-github-app) to create your own GitHub app and configure environment variables
+
+### Running in dev mode
+
+```
+npm run dev
+```
+
+## License
+
+MIT