Add project scaffolding and documentation

Add .env.example with configuration for database, Redis, security, SMTP, workers, and plugins. Add .gitignore for Python, Node.js, Next.js, Docker volumes, and IDE files. Add MIT License. Update README.md with feature overview, quick start guide, architecture description, plugin system documentation, security details, backup/restore instructions, and developer setup. Add Alembic configuration files and placeholder directories for API, web, worker, and plugin components

docs/deployment/README.md

@@ -0,0 +1,76 @@
+# NexaDash Deployment Guide
+
+## Quick Start with Docker Compose
+
+1. Copy the example environment:
+
+```bash
+cp .env.example .env
+```
+
+2. Edit `.env` and set strong passwords and secrets.
+
+3. Start the stack:
+
+```bash
+docker compose up -d
+```
+
+4. Open `http://localhost:3000` and complete the setup wizard.
+
+## Services
+
+- `web` — Next.js frontend (port 3000).
+- `api` — FastAPI backend (port 8000).
+- `worker` — Celery background worker.
+- `postgres` — PostgreSQL database.
+- `redis` — Redis for cache, jobs and sessions.
+
+## Reverse Proxy
+
+Set `NEXADASH_WEB_URL` and `NEXADASH_API_URL` to your public URLs. Use a reverse proxy with HTTPS. The API expects the web origin in its CORS allowlist.
+
+## Healthchecks
+
+- API: `GET /health`
+- Web: built-in Docker healthcheck
+
+## Backup and Restore
+
+### Database Backup
+
+```bash
+docker compose exec postgres pg_dump -U nexadash nexadash > backup.sql
+```
+
+### Restore
+
+```bash
+docker compose exec -T postgres psql -U nexadash nexadash < backup.sql
+```
+
+### Volumes
+
+Important Docker volumes:
+
+- `postgres_data` — database files.
+- `redis_data` — Redis persistence.
+- `plugin_data` — uploaded plugin files.
+
+## Updates
+
+```bash
+git pull
+docker compose build
+docker compose up -d
+```
+
+Run migrations after updates:
+
+```bash
+docker compose exec api alembic upgrade head
+```
+
+## Development
+
+See `README.md` for developer setup.