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>

amplify.yml

@@ -5,13 +5,19 @@ frontend:
       commands:
         - npm ci
         - npm run security:check
+        # Print env vars for debugging (without exposing values)
+        - env | grep CONFLUENCE | sed 's/=.*/=***/'
     build:
       commands:
         - npm run build
   artifacts:
-    baseDirectory: .next
+    baseDirectory: ./
     files:
-      - '**/*'
+      - .next/**/*
+      - node_modules/**/*
+      - package.json
+      - next.config.js
+      - public/**/*
   cache:
     paths:
       - node_modules/**/*