Added a bit of documentation

README.md

@@ -3,3 +3,28 @@
 [![Poetry](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/githuib/powerchord/master/assets/logo.json)](https://pypi.org/project/powerchord)
 [![PyPI - Version](https://img.shields.io/pypi/v/powerchord)](https://pypi.org/project/powerchord/#history)
 [![PyPI - Python Versions](https://img.shields.io/pypi/pyversions/powerchord)](https://pypi.org/project/powerchord)
+
+## Installation
+
+```sh
+python3 -m pip install -U powerchord
+```
+
+## Usage
+
+Currently, tasks need to be specified in `pyproject.toml`:
+
+```toml
+# tasks to do
+[tool.powerchord.tasks]
+do-something = "command --foo bar /path/to/happiness"
+do-something-else = "..."
+you-get-the-idea = "..."
+
+# config
+[tool.powerchord.verbosity]
+# show output of successful tasks
+success = ["info", "error"]  # default []
+# show output of failed tasks
+fail = ["info", "error"]  # default ["info", "error"]
+```