docs: reduce horizontal lines

README.md

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 [![CI Status](https://img.shields.io/badge/build-pending-lightgrey.svg)](link-to-ci)  
 ![License](https://img.shields.io/badge/license-TBD-blue)  
 
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 ## 🚧 Project Status
 
 ⚠️ **Early development** — not production-ready. Expect breaking changes.  
 Contributions and feedback are welcome!
 
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 ## ✨ Overview
 
 Mila is a free and open-source membership management tool designed for real club needs.  
 It is **self-hosting friendly**, aims for **accessibility and GDPR compliance**, and focuses on **usability** instead of feature overload.  
 
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 ## 💡 Why Mila?
 
 Most membership tools for clubs are either:
@@ -38,15 +32,11 @@ Most membership tools for clubs are either:
 
 Our philosophy: **software should help people spend less time on administration and more time on their community.**
 
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 ## 📸 Screenshots
 
 ![Screenshot placeholder](docs/images/screenshot.png)  
 *This is how Mila might look in action.*  
 
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 ## 🔑 Features
 
 - ✅ Manage member data with ease  
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 - 🚧 Accessibility, GDPR, usability improvements  
 - 🚧 Email sending  
 
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 ## 🚀 Quick Start (Development)
 
 ### Prerequisites
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 > Note: running `mix local.hex` must be done inside the repo folder,  
 > because `.tool-versions` defines the Erlang/Elixir versions.
 
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 ### Run the app
 
 1. Copy env file:  
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    - Mail UI: <http://localhost:1080>  
    - Postgres: `localhost:5000`  
 
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 ## 🔐 Testing SSO locally
 
 Mila uses OIDC for Single Sign-On. In development, a local **Rauthy** instance is provided.  
@@ -165,8 +149,6 @@ Mila uses OIDC for Single Sign-On. In development, a local **Rauthy** instance i
 
 Now you can log in to Mila via OIDC!  
 
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 ## ⚙️ Configuration
 
 - **Env vars:** see `.env.example`  
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   - User/pass: `postgres` / `postgres`  
   - DB: `mila_dev`  
 
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 ## 🏗️ Architecture
 
 - **Backend:** Elixir, Phoenix 1.8, LiveView 1.1, Ash Framework  
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 - `lib/mv_web/` — Phoenix controllers, LiveViews, components  
 - `assets/` — frontend assets (Tailwind, JS, etc.)  
 
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 ## 🧑‍💻 Development
 
 Useful `just` commands:  
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 - `just reset-database` — reset local DB  
 - `just regen-migrations <name>` — regenerate migrations  
 
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 ## 📦 Deployment
 
 A production release image is built via the provided `Dockerfile`.  
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 More detailed deployment docs are planned.  
 
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 ## 🤝 Contributing
 
 We welcome contributions!  
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 - Please follow existing code style and conventions.  
 - Expect breaking changes while the project is in early development.  
 
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 ## 📄 License
 
 **License: TBD** (Free and Open Source).  
 A proper license file will be added soon.  
 
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 ## 📬 Contact
 
 - Issues: [GitLab Issues](https://git.local-it.org/local-it/mitgliederverwaltung/-/issues)  
 - Community links: coming soon.  
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