Add setup documentation

README.md

@@ -7,6 +7,29 @@ cargo build --release
 cp target/release/taurus /usr/bin/taurus
 ```
 
+## Usage
+
+By default, taurus looks for a configuration file at `/etc/taurus/taurus.toml`. Fields that can be configured are defined in `src/config.rs`.
+
+An example config might look like this:
+
+```toml
+
+# Default gemini port is 1965
+port = 1965
+
+# Your TLS certificate
+certificate_file= "identity.pfx"
+
+# Must match with the password of the generated certificate
+certificate_password = "mysecretpassword"
+
+# Your gemini files
+static_root = "/var/www/gemini"
+```
+
+You will need a TLS certificate in order to use taurus. To generate one, take a look at the section below.
+
 ## Generating a test-certificate
 
 At the current state of the project, you need to generate a server certificate by hand. Take a look at `contrib/generate_cert.sh`, and run it.