better doc

Author: Igor Živković

README.md

@@ -1,2 +1,19 @@
-# Tinyproxy exporter
-Prometheus exporter for Tinyproxy, written in Python.
+# tinyproxy_exporter
+
+A simple Prometheus exporter for Tinyproxy.
+
+## Usage
+
+```
+$ pip install -r requirements.txt
+$ python3 tinyproxy_exporter --help
+usage: tinyproxy_exporter [-h] [-l LISTEN] [-s STATHOST] [-t TINYPROXY]
+
+Prometheus exporter for Tinyproxy.
+
+optional arguments:
+  -h, --help    show this help message and exit
+  -l LISTEN     address on which to expose metrics (default ":9240")
+  -s STATHOST   internal statistics page address (default "tinyproxy.stats")
+  -t TINYPROXY  tinyproxy address (default "127.0.0.1:8888")
+```