refactor: move api to /api

serve api under /api

src/api/mod.rs

@@ -1,2 +1,11 @@
-pub mod v1;
-pub mod versions;
+use actix_web::Scope;
+use actix_web::web;
+
+mod v1;
+mod versions;
+
+pub fn web() -> Scope {
+    web::scope("/api")
+        .service(v1::web())
+        .service(versions::res)
+}