Add documentation of the main crate and first objects.

src/main.rs

@@ -1,8 +1,4 @@
-#![warn(missing_docs)]
-
 #![doc = include_str!("../README.md")]
-/// ## Usage
-///
 
 use axum::{
     extract::{Host, Json, OriginalUri},
@@ -16,6 +12,11 @@ use std::collections::BTreeMap;
 use tower_http::trace;
 use tracing::{info, warn, Level};
 
+
+/// CLI arguments used by the [Parser].
+///
+/// Creates the usage and version information that is standard in a CLI
+/// utility.
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct CliArgs {
@@ -28,12 +29,18 @@ struct CliArgs {
     ips: String,
 }
 
+/// The response consisting of the echoed request to the mirror-server.
 #[derive(Serialize, Deserialize, Debug, PartialEq)]
 struct EchoResponse {
+    /// The [Method] used in the request.
     method: String,
+    /// The path used in the request.
     path: String,
+    /// The original schema, hostname and port of the request.
     host: String,
+    /// The headers in the request.
     headers: BTreeMap<String, String>,
+    /// (Optional) The JSON body in the request.
     #[serde(skip_serializing_if = "Option::is_none")]
     body: Option<Value>,
 }