fix: disable NX daemon and fix env vars for faster Docker builds

- Add NX_DAEMON=false to all Dockerfiles to prevent slow daemon startup
- Add --env-file flag to hackathon build for proper env var substitution

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

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

docker/hackathon.Dockerfile

@@ -16,6 +16,7 @@ ARG VITE_SUPABASE_ANON_KEY
 ENV VITE_SUPABASE_URL=$VITE_SUPABASE_URL
 ENV VITE_SUPABASE_ANON_KEY=$VITE_SUPABASE_ANON_KEY
 
+ENV NX_DAEMON=false
 RUN npm run hackathon:build
 
 FROM nginx:alpine AS runner