fix bounded standalone production build

frontend/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "next dev",
-    "build": "next build",
+    "build": "next build --webpack",
     "start": "next start",
     "test": "tsx --test tests/*.test.ts",
     "test:db": "tsx --test --test-concurrency=1 tests/database-*.test.ts",

frontend/tests/staging-backend-workflows.test.ts

@@ -87,6 +87,7 @@ const railwayWebDockerfile = new URL(
   import.meta.url,
 );
 const nextConfig = new URL("../next.config.ts", import.meta.url);
+const frontendPackage = new URL("../package.json", import.meta.url);
 
 function read(url: URL): string {
   return readFileSync(url, "utf8");
@@ -129,7 +130,9 @@ test("changed staging workflows are syntactically valid YAML", () => {
 test("railway web image uses Next standalone runtime output", () => {
   const dockerfile = read(railwayWebDockerfile);
   const config = read(nextConfig);
+  const packageJson = JSON.parse(read(frontendPackage)) as { scripts?: { build?: string } };
 
+  assert.equal(packageJson.scripts?.build, "next build --webpack");
   assert.match(config, /output: "standalone"/);
   assert.match(config, /outputFileTracingRoot: repositoryRoot/);
   assert.match(dockerfile, /RUN npm run build\n/);