feat(build-docs): copy swagger UI

apps/build-docs/src/main.ts

@@ -0,0 +1,9 @@
+import { join } from "path";
+import BuildContext from "./context";
+import buildSwagger from "./swagger";
+
+const context: BuildContext = {
+    baseDir: join(__dirname, "../../../site")
+};
+
+buildSwagger(context);