vmm: api: Log HTTP API error responses

Although a response is sent to the client these errors are not logged in
the log file making it hard to cross reference these with other log
entries.

Signed-off-by: Rob Bradford <rbradford@meta.com>

vmm/src/api/http/mod.rs

@@ -15,7 +15,7 @@ use std::sync::mpsc::Sender;
 use std::thread;
 
 use hypervisor::HypervisorType;
-use log::error;
+use log::{error, info};
 use micro_http::{
     Body, HttpServer, MediaType, Method, Request, Response, ServerError, StatusCode, Version,
 };
@@ -90,6 +90,8 @@ pub fn error_response(error: HttpError, status: StatusCode) -> Response {
     .map(|error| format!("{error}"))
     .collect::<Vec<_>>();
 
+    info!("HTTP API error response: {}", error_messages.join(": "));
+
     // TODO: Move `api` module from `vmm` to dedicated crate and use a common type definition
     let json = serde_json::to_string(&error_messages).unwrap();