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+# IONOS DDNS Auto-Updater & Creator
+
+A Python-based system service that automatically updates DNS records on IONOS. Unlike standard DDNS scripts, this solution uses the **IONOS REST API**, allowing it to:
+1. **Update** existing DNS records.
+2. **Create** new DNS records automatically if they don't exist.
+3. Check the current DNS value before updating to avoid API rate limits.
+
+## Features
+- **Smart Check:** Compares public IP with current DNS resolution before sending API requests.
+- **Auto-Discovery:** Automatically detects which DNS Zone a subdomain belongs to.
+- **System Service:** Runs as a background `systemd` service with crash protection.
+- **Logging:** Detailed logs in `/var/log/ionos-ddns.log`.
+
+## Prerequisites
+- Python 3
+- An IONOS account with access to the "Developer API".
+- An API Key (Prefix + Secret) generated at [developer.hosting.ionos.com](https://developer.hosting.ionos.com/).
+
+## Installation
+
+### 1. Clone the repository to `/opt`
+It is recommended to install this in a system directory.
+
+```bash
+sudo mkdir -p /opt/ionos-ddns
+sudo git clone [https://github.com/TWOJA_NAZWA/ionos-ddns.git](https://github.com/TWOJA_NAZWA/ionos-ddns.git) /opt/ionos-ddns
+cd /opt/ionos-ddns