fix(startup): honor everywhere; default PORT=7860; start binds -H 0.0.0.0

Dockerfile

@@ -17,10 +17,11 @@ RUN npm run build
 # Expose the port expected by Hugging Face Docker Spaces
 EXPOSE 7860
 
-# HF Spaces provides $PORT. Start Next.js on that port and bind to all interfaces.
 ENV HOST=0.0.0.0
+# Default to the Space port, but allow HF to override
+ENV PORT=7860
 # Disable telemetry and ensure production env
 ENV NEXT_TELEMETRY_DISABLED=1
 ENV NODE_ENV=production
-# Run Next directly on the fixed port used by Spaces
-CMD ["sh", "-c", "node node_modules/next/dist/bin/next start -H 0.0.0.0 -p 7860"]
+# Run Next directly and honor $PORT
+CMD ["sh", "-c", "node node_modules/next/dist/bin/next start -H 0.0.0.0 -p ${PORT}"]

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "dev": "next dev --turbopack",
     "build": "next build",
-    "start": "next start",
+    "start": "next start -H 0.0.0.0 -p ${PORT:-7860}",
     "lint": "next lint"
   },
   "dependencies": {