feat: with spin test app

Signed-off-by: kjuulh <contact@kjuulh.io>

app/spin-test-app/src/lib.rs

@@ -0,0 +1,13 @@
+use spin_sdk::http::{IntoResponse, Request, Response};
+use spin_sdk::http_component;
+
+/// A simple Spin HTTP component.
+#[http_component]
+fn handle_spin_test_app(req: Request) -> anyhow::Result<impl IntoResponse> {
+    println!("Handling request to {:?}", req.header("spin-full-url"));
+    Ok(Response::builder()
+        .status(200)
+        .header("content-type", "text/plain")
+        .body("Hello, Fermyon")
+        .build())
+}