fix staging web image publish

deploy/railway-web.Dockerfile

@@ -21,16 +21,18 @@ COPY references /app/references
 COPY scripts /app/scripts
 COPY skills /app/skills
 
-RUN npm run build && npm prune --omit=dev
+RUN npm run build
 
 FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/library/node:22-alpine
 
 WORKDIR /app/frontend
-COPY --from=build /app /app
+COPY --from=build /app/frontend/.next/standalone /app
+COPY --from=build /app/frontend/.next/static /app/frontend/.next/static
+COPY --from=build /app/frontend/public /app/frontend/public
 
 ARG NEXT_PUBLIC_SUPABASE_URL
 ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
 ENV NEXT_PUBLIC_SUPABASE_URL=${NEXT_PUBLIC_SUPABASE_URL} \
     NEXT_PUBLIC_SUPABASE_ANON_KEY=${NEXT_PUBLIC_SUPABASE_ANON_KEY}
 ENV NODE_ENV=production
-CMD ["sh", "-c", "exec npm start -- --hostname 0.0.0.0 --port \"${PORT:-3000}\""]
+CMD ["node", "server.js"]

frontend/next.config.ts

@@ -6,6 +6,7 @@ const repositoryRoot = path.join(process.cwd(), "..");
 const nextConfig: NextConfig = {
   devIndicators: false,
   experimental: { authInterrupts: true },
+  output: "standalone",
   turbopack: { root: repositoryRoot },
   outputFileTracingRoot: repositoryRoot,
   outputFileTracingIncludes: {

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

@@ -82,6 +82,11 @@ const productionDatabaseEnvValidator = new URL(
   "../../deploy/validate-production-database-env.sh",
   import.meta.url,
 );
+const railwayWebDockerfile = new URL(
+  "../../deploy/railway-web.Dockerfile",
+  import.meta.url,
+);
+const nextConfig = new URL("../next.config.ts", import.meta.url);
 
 function read(url: URL): string {
   return readFileSync(url, "utf8");
@@ -121,6 +126,23 @@ 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);
+
+  assert.match(config, /output: "standalone"/);
+  assert.match(config, /outputFileTracingRoot: repositoryRoot/);
+  assert.match(dockerfile, /RUN npm run build\n/);
+  assert.doesNotMatch(dockerfile, /npm prune --omit=dev/);
+  assert.match(dockerfile, /COPY --from=build \/app\/frontend\/\.next\/standalone \/app/);
+  assert.match(dockerfile, /COPY --from=build \/app\/frontend\/\.next\/static \/app\/frontend\/\.next\/static/);
+  assert.match(dockerfile, /COPY --from=build \/app\/frontend\/public \/app\/frontend\/public/);
+  assert.doesNotMatch(dockerfile, /COPY --from=build \/app \/app/);
+  assert.match(dockerfile, /WORKDIR \/app\/frontend/);
+  assert.match(dockerfile, /CMD \["node", "server\.js"\]/);
+  assert.doesNotMatch(dockerfile, /npm start/);
+});
+
 test("quality gate validates relevant changes once and publishes a digest manifest", () => {
   const workflow = read(qualityWorkflow);