reorder CLI args, update README

README.md

@@ -23,7 +23,19 @@ Without nix: check out this repository and use `cargo run --release`.
 
 ## Command line arguments
 
-The application binds to `0.0.0.0:2342` by default (`./servicepoint-simulator --bind host:port` to change this).
+```
+Usage: servicepoint-simulator [OPTIONS]
+
+Options:
+      --bind <BIND>  address and port to bind to [default: 0.0.0.0:2342]
+  -f, --font <FONT>  The name of the font family to use. This defaults to the system monospace font.
+  -s, --spacers      add spacers between tile rows to simulate gaps in real display
+  -r, --red          Use the red color channel
+  -g, --green        Use the green color channel
+  -b, --blue         Use the blue color channel
+  -v, --verbose      Set default log level lower. You can also change this via the RUST_LOG environment variable.
+  -h, --help         Print help
+```
 
 See [env_logger](https://docs.rs/env_logger/latest/env_logger/) to configure logging.