Add environment configuration and local development documentation

- Parameterize CORS_ORIGINS in docker-compose.swarm.yml
- Add .env.example with configuration options
- Create comprehensive LOCAL_DEVELOPMENT.md guide
- Update README.md with environment variable documentation
- Provide alternatives for local development without production domain

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

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

frontend/node_modules/@rollup/rollup-linux-x64-musl/README.md

@@ -0,0 +1,3 @@
+# `@rollup/rollup-linux-x64-musl`
+
+This is the **x86_64-unknown-linux-musl** binary for `rollup`