Add health check endpoint

src/main.rs

@@ -13,6 +13,10 @@ use tower_http::trace::{self, TraceLayer};
 use tracing::Level;
 use tracing_subscriber::{filter, layer::SubscriberExt, util::SubscriberInitExt};
 
+async fn health() -> &'static str {
+    "OK"
+}
+
 async fn update(headers: HeaderMap) -> &'static str {
     let config_api_key = config::CONFIG.api_key.clone();
 
@@ -57,7 +61,10 @@ async fn main() {
         .with(sentry_layer)
         .init();
 
-    let app = Router::new().route("/update", post(update)).layer(
+    let app = Router::new()
+        .route("/health", axum::routing::get(health))
+        .route("/update", post(update))
+        .layer(
             TraceLayer::new_for_http()
                 .make_span_with(trace::DefaultMakeSpan::new().level(Level::INFO))
                 .on_response(trace::DefaultOnResponse::new().level(Level::INFO)),