Add a docker build step.

frontend/react-router.config.ts

@@ -4,7 +4,4 @@ export default {
   // Config options...
   // Server-side render by default, to enable SPA mode set this to `false`
   ssr: true,
-  serverBuildDirectory: "build/server",
-  serverModuleFormat: "esm",
-  serverMiddleware: "./middleware.js",
 } satisfies Config;