Package with nix and add systemd unit example

blahd/src/config.rs

@@ -11,9 +11,11 @@ pub struct Config {
     pub server: ServerConfig,
 }
 
+#[serde_inline_default]
 #[derive(Debug, Clone, Deserialize)]
 #[serde(deny_unknown_fields)]
 pub struct DatabaseConfig {
+    #[serde_inline_default("/var/lib/blahd/db.sqlite".into())]
     pub path: PathBuf,
 }
 

blahd/src/main.rs

@@ -31,7 +31,9 @@ mod middleware;
 mod config;
 mod utils;
 
+/// Blah Chat Server
 #[derive(Debug, clap::Parser)]
+#[clap(about, version = option_env!("CFG_RELEASE").unwrap_or(env!("CARGO_PKG_VERSION")))]
 enum Cli {
     /// Run the server with given configuration.
     Serve {