Fix Next.js API route for Amplify WEB_COMPUTE platform

- Add .env.production for Amplify environment variable mapping
- Update artifacts configuration for WEB_COMPUTE platform
- Add explicit nodejs runtime for API route
- Enable serverActions in Next.js config
- Add debugging output for environment variables

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/api/filaments/route.ts

@@ -1,6 +1,8 @@
 import { NextResponse } from 'next/server';
 import { fetchFromConfluence } from '../../../src/server/confluence';
 
+export const runtime = 'nodejs';
+
 export async function GET() {
   try {
     // Get environment variables from server-side only