chore: update Dockerfile

Dockerfile

@@ -19,6 +19,14 @@ RUN npm install sharp
 # Build the Next.js application
 RUN npm run build
 
+# Add debugging steps
+RUN echo "Contents of /app directory:"
+RUN ls -la /app
+RUN echo "Contents of /app/.next directory:"
+RUN ls -la /app/.next
+RUN echo "Contents of /app/.next/standalone directory (if it exists):"
+RUN ls -la /app/.next/standalone || echo "Standalone directory not found"
+
 # Production stage
 FROM node:18-alpine AS runner