Return "Hello from Conduit!" on the / route

akin to Synapes's "It works!" page, removing an unnecessary warning
about / route being unknown

Signed-off-by: girlbossceo <june@girlboss.ceo>

src/main.rs

@@ -433,6 +433,7 @@ fn routes() -> Router {
             "/_matrix/client/v3/rooms/:room_id/initialSync",
             get(initial_sync),
         )
+        .route("/", get(it_works))
         .fallback(not_found)
 }
 
@@ -482,6 +483,10 @@ async fn initial_sync(_uri: Uri) -> impl IntoResponse {
     )
 }
 
+async fn it_works() -> &'static str {
+    "Hello from Conduit!"
+}
+
 trait RouterExt {
     fn ruma_route<H, T>(self, handler: H) -> Self
     where