fix: enable standalone output and remove public directory copy

- Re-enable output: 'standalone' in next.config.ts for Docker builds
- Remove public directory copy from Dockerfile (not needed for this project)
- Standalone mode works with force-dynamic routing to prevent SSR issues

Fixes Gitea Actions build failure where .next/standalone was not found

Dockerfile

@@ -49,8 +49,8 @@ RUN addgroup --system --gid 1001 nodejs && \
     adduser --system --uid 1001 nextjs
 
 # Copy necessary files from builder
-COPY --from=builder /app/public ./public
-COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+# Note: public directory is optional - only copy if it exists
+COPY --from=builder /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
 # Switch to non-root user

next.config.ts

@@ -2,8 +2,7 @@ import type { NextConfig } from 'next';
 
 const nextConfig: NextConfig = {
   reactStrictMode: true,
-  // Note: Using default mode (not standalone) to avoid SSR issues with client components
-  // For Docker, we'll use regular server mode which works fine
+  output: 'standalone',
 };
 
 export default nextConfig;