feat: implement openapi (#482)

packages/api/src/open-api.ts

@@ -0,0 +1,11 @@
+import { generateOpenApiDocument } from "trpc-swagger";
+
+import { appRouter } from "./root";
+
+export const openApiDocument = (base: string) =>
+  generateOpenApiDocument(appRouter, {
+    title: "Homarr API documentation",
+    version: "1.0.0",
+    baseUrl: base,
+    docsUrl: "https://homarr.dev",
+  });