Add a first draft of README

# Clams

Maintainer: Gruppe Technik <technik@cl.uni-heidelberg.de>

**C**omputational **L**inguistic **A**ccount **M**anagement **S**ystem (Clams) manages accounts at the Institut für Computerlinguistik, Universität Heidelberg.

## 🏃 Run it

```bash

source venv/bin/activate

FLASK_APP=clams python3 -m flask run

```

This assumes you already have a `venv` created and installed the requirements.