Fix: Update Node.js to v20 for Next.js 16 compatibility

Dockerfile

@@ -1,7 +1,7 @@
 # Multi-stage build for production
 
 # Stage 1: Build Frontend
-FROM node:18-alpine AS frontend-builder
+FROM node:20-alpine AS frontend-builder
 
 WORKDIR /app/frontend
 
@@ -36,9 +36,9 @@ COPY --from=frontend-builder /app/frontend/node_modules ./frontend/node_modules
 
 # Create startup script
 RUN echo '#!/bin/bash\n\
-cd /app/backend && uvicorn main:app --host 0.0.0.0 --port 8000 &\n\
-cd /app/frontend && npm start -- -p 7860\n\
-wait' > /app/start.sh && chmod +x /app/start.sh
+    cd /app/backend && uvicorn main:app --host 0.0.0.0 --port 8000 &\n\
+    cd /app/frontend && npm start -- -p 7860\n\
+    wait' > /app/start.sh && chmod +x /app/start.sh
 
 # Expose port
 EXPOSE 7860