Add installation and usage instructions to README

README.md

@@ -7,3 +7,31 @@ If you'd like a more detailed description of what it is, its purpose, origins an
 You can find documentation in the [docs](docs) directory:
 - [Usage documentation](docs/usage)
 - [Development documentation](docs/development)
+
+## Installation
+
+As it is still in very early development, tori is not yet packaged.
+
+If you want to try it, you can clone this repository to your system and create the configuration file at `~/.config/tori/tori.conf` containing the following setting:
+
+```conf
+tori_root = /path/to/repository
+```
+
+If you clone it to the default location, `~/.local/share/tori`, the above step is not necessary.
+
+Finally, you need to symlink the `tori` file at the repository root to somewhere on your `$PATH`:
+
+```
+ln -s /path/to/repository/tori $HOME/.local/bin/tori
+```
+
+## Usage
+
+Currently, the following options are implemented:
+
+- `check`: check for divergences between the configuration and the system
+- `help`: show a usage summary with supported options
+- `version`: print the current version and its release date
+
+To issue a command, use `tori <command>`, as in `tori check`.