docs: add README

README.md

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+# infra-scripts
+
+Public infrastructure deployment scripts designed to be executed directly via `curl | bash`.
+
+## Philosophy
+
+These scripts automate the deployment of personal infrastructure components. They are:
+
+- **Self-contained**: No external dependencies beyond standard Debian packages
+- **Idempotent-ish**: Safe to re-run (where possible)
+- **Curl-friendly**: Designed for one-liner deployment from a fresh server
+
+## Available Scripts
+
+| Script | Description | Usage |
+|--------|-------------|-------|
+| `proxy/install.sh` | Deploy a reverse proxy server with Tailscale + Nginx Proxy Manager | See below |
+
+## Usage
+
+### Proxy Server
+
+Deploys a secure reverse proxy with:
+- **Tailscale** for private network access (SSH, admin panel)
+- **Nginx Proxy Manager** for public reverse proxy (HTTP/HTTPS)
+- **UFW** firewall configured to expose only ports 80/443 publicly
+- **fail2ban** and **unattended-upgrades** for basic hardening
+
+```bash
+curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/proxy/install.sh | bash
+```
+
+#### Environment Variables
+
+You can customize the deployment:
+
+```bash
+# Custom hostname (default: proxy)
+PROXY_HOSTNAME=myproxy curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/proxy/install.sh | bash
+
+# Custom timezone (default: Europe/Paris)
+TZ=America/New_York curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/proxy/install.sh | bash
+```
+
+#### Requirements
+
+- Fresh Debian 11/12 installation
+- User with sudo privileges (do not run as root)
+- Internet access
+
+#### What it does
+
+1. Sets hostname
+2. Installs base packages (vim, fail2ban, unattended-upgrades)
+3. Installs and connects Tailscale (will prompt for authentication)
+4. Configures sysctl for exit-node capability
+5. Installs Docker
+6. Configures UFW (80/443 public, everything else via Tailscale only)
+7. Deploys Nginx Proxy Manager
+8. Exposes NPM admin panel via Tailscale serve
+
+#### Post-install
+
+- Access NPM admin: `https://proxy.<your-tailnet>.ts.net`
+- Default credentials: `admin@example.com` / `changeme`
+- Optionally approve exit-node in Tailscale admin console
+
+## License
+
+MIT - Do whatever you want with these scripts.