add about

Cargo.toml

@@ -2,6 +2,7 @@
 name = "elm-duet"
 version = "0.1.0"
 edition = "2021"
+description = "Generate Elm and TypeScript types from a single shared definition."
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

README.md

@@ -54,6 +54,8 @@ Here are more things you can do with the tool:
 
 ```console
 $ elm-duet --help
+Generate Elm and TypeScript types from a single shared definition.
+
 Usage: elm-duet <SOURCE>
 
 Arguments:

src/main.rs

@@ -7,7 +7,7 @@ use eyre::WrapErr;
 use std::path::PathBuf;
 
 #[derive(Debug, Parser)]
-#[clap(version)]
+#[clap(version, about)]
 struct Cli {
     /// Location of the definition file
     source: PathBuf,