update README

Author: MalteSchwitters

frontend/README.md

@@ -1,3 +1,39 @@
-# Lissi App
+# Frontend
 
-TODO
+This is the frontend for the event planner app. 
+
+## Prerequisites
+
+To run the frontend locally you need `node` version 22 and npm installed. 
+In addition, the frontend needs the backend to run on port 8081 for local development.
+
+## Getting started
+
+### Install dependencies
+```bash
+npm install
+```
+
+### Starting the dev server
+This starts the frontend on http://localhost:8080.
+```bash
+npm run dev
+```
+
+### Building
+These steps are also executed in the pipeline and will break the build, when an error is found.  
+It is recommended to run these scripts at least once before commiting.
+```bash
+npm run lint
+npm run format
+npm run build
+```
+
+## Dependencies
+-   [Node 22](https://nodejs.org/en/)
+-   [Vite](https://vitejs.dev/)
+-   [Vue 3](https://v3.vuejs.org/)
+-   [Tailwind CSS](https://tailwindcss.com/)
+-   [ESLint](https://eslint.org/)
+-   [Prettier](https://prettier.io/)
+-   [Vue I18n](https://vue-i18n.intlify.dev/)