Update README

README.md

@@ -11,12 +11,30 @@ This repository contains a python scripts that can check your energy usage stati
 * Maintaining a cache file (`cache.csv`) to avoid unnecessary API calls (data from this file can be easily loaded to a spreadsheet)
 * Generating an ASCII table with monthly data
 * Calculating a simple estimation for the current month
+* Exporting data to `csv` or `json` format
+
+# How to use?
 
 ## Requirements
 * python 3.11+
 * packages from `requirements.txt`
 
-# Configuration file
+## Installation
+Clone repository:
+
+```
+git clone https://github.com/Bozydarek/tauron_statistics.git
+cd tauron_statistics
+python3 -m pip -r requirements.txt
+```
+
+Create configuration file:
+```
+cp config.example.yml config.yml
+```
+... and edit with your favorite editor 😉
+
+## Configuration file
 
 To use this script you need to create a configuration (`config.yml`) based on the example (`config.example.yml`).
 
@@ -39,4 +57,5 @@ python3 tauron_statistics.py
 python3 tauron_statistics.py -y
 python3 tauron_statistics.py -y 2022 --off
 python3 tauron_statistics.py -y --no-cache
+python3 tauron_statistics.py --offline --format csv
 ```