add readme

README.md

@@ -1,2 +1,27 @@
 # flask-beertap
 
+## How to run
+
+If you want a production environment set up your `.env` to provide an app key.
+
+```python
+pipenv install
+pipenv run python main.py
+chromium-browser 127.0.0.1:5000
+```
+
+## gpio handler
+
+Takes care of the needed raspberry pi gpio functions.
+
+```python
+from gpio_handler import create_output
+
+out = create_output()
+out.gpio_test()
+out.gpio_set_pulse(channel=1, time_on=2)
+```
+
+## Author
+
+Aaron Schmocker <schmocker@puzzle.ch>