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/backoffice.Dockerfile

@@ -7,6 +7,7 @@ FROM node:22-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
+ENV NX_DAEMON=false
 RUN npm run backoffice:build
 
 FROM nginx:alpine AS runner