update README.md

README.md

@@ -3,9 +3,7 @@
 [![Build Status](https://github.com/mrunknownde/utools/actions/workflows/docker-build-push.yml/badge.svg)](https://github.com/mrunknownde/utools/actions/workflows/docker-build-push.yml)
 [![Update MaxMind GeoLite2 DBs](https://github.com/MrUnknownDE/utools/actions/workflows/maxmind-update.yml/badge.svg)](https://github.com/MrUnknownDE/utools/actions/workflows/maxmind-update.yml)
 
-
+A modern web application that displays detailed information about a client's IP address, including geolocation, ASN, rDNS, and provides network diagnostic tools like Ping, Traceroute, DNS Lookup, Subnet Calculation, and WHOIS Lookup. It also allows looking up information for any public IP address.
-
-A modern web application that displays detailed information about a client's IP address, including geolocation, ASN, rDNS, and provides network diagnostic tools like Ping and Traceroute. It also allows looking up information for any public IP address.
 
 <!-- Optional: Füge hier einen Screenshot hinzu -->
 <!-- ![Screenshot](link/to/your/screenshot.png) -->
@@ -19,9 +17,12 @@ A modern web application that displays detailed information about a client's IP
 *   **ASN Information:** Displays the Autonomous System Number (ASN) and organization name.
 *   **Reverse DNS (rDNS):** Performs a reverse DNS lookup for the IP address.
 *   **Interactive Map:** Visualizes the geolocation on an OpenStreetMap.
+*   **IP Lookup:** Allows users to enter any public IP address to retrieve its Geo, ASN, and rDNS information.
 *   **Traceroute:** Initiates a server-side traceroute (via SSE stream) to the client's IP (on click) or a looked-up IP.
 *   **Ping:** Performs a server-side ping test to a looked-up IP.
-*   **IP Lookup:** Allows users to enter any public IP address to retrieve its Geo, ASN, and rDNS information.
+*   **DNS Lookup:** Performs various DNS record lookups (A, AAAA, MX, NS, TXT, SOA) for a given domain.
+*   **Subnet Calculator:** Calculates network details (Network Address, Broadcast Address, Usable Hosts, etc.) for a given IP and CIDR or Subnet Mask.
+*   **WHOIS Lookup:** Retrieves WHOIS information for a given domain or IP address.
 *   **Dockerized:** Both frontend and backend are containerized for easy deployment.
 *   **Modern UI:** Built with Tailwind CSS for a clean and responsive interface.
 
@@ -32,7 +33,9 @@ A modern web application that displays detailed information about a client's IP
     *   Express.js
     *   MaxMind GeoLite2 Databases (for GeoIP and ASN)
     *   Pino (for logging)
-    *   `net`, `dns`, `child_process` (Node.js built-ins)
+    *   `whois-json` (for WHOIS lookups)
+    *   `net`, `dns`, `child_process` (Node.js built-ins for Ping, Traceroute, rDNS, DNS Lookup)
+    *   `@sentry/node` (optional error tracking)
 *   **Frontend:**
     *   Vanilla JavaScript (ES6+)
     *   Tailwind CSS (via Play CDN for simplicity, can be built)
@@ -73,6 +76,8 @@ This method uses the Docker images automatically built and pushed to GitHub Cont
           PORT: 3000
           LOG_LEVEL: info # Adjust log level if needed (e.g., 'debug', 'warn')
           PING_COUNT: 4
+          # Optional: Set Sentry DSN for error tracking if you use Sentry
+          # SENTRY_DSN: "YOUR_SENTRY_DSN"
         dns:
           # Explicitly set reliable public DNS servers for rDNS lookups inside the container
           - 1.1.1.1    # Cloudflare DNS
@@ -105,8 +110,9 @@ This method uses the Docker images automatically built and pushed to GitHub Cont
 2.  **Start the Application:**
     Open a terminal in the directory where you saved the `docker-compose.yml` file and run:
     ```bash
-    docker-compose up -d
+    docker compose up -d
     ```
+    *(Note: Use `docker-compose` (with hyphen) if you have an older version)*
     This will download the images (if not already present) and start the containers in the background.
 
 3.  **Access the Webapp:**
@@ -124,9 +130,11 @@ If you want to modify the code or build the images yourself:
 2.  **Build and Start:**
     Use Docker Compose to build the images based on the `Dockerfile`s in the `backend` and `frontend` directories and then start the containers:
     ```bash
-    docker-compose -f compose.yml up -d --build
+    # Optional: Set GIT_COMMIT_SHA for build args if needed
+    # export GIT_COMMIT_SHA=$(git rev-parse --short HEAD)
+    docker compose -f compose.yml up -d --build
     ```
-    *(Note: Ensure your `compose.yml` points to `build: ./backend` and `build: ./frontend` instead of `image: ...` if you modify the provided compose file)*
+    *(Note: Use `docker-compose` (with hyphen) if you have an older version. The `compose.yml` in the repository correctly uses `build:` directives)*
 
 3.  **Access the Webapp:**
     Open your web browser and navigate to `http://localhost:8080`.
@@ -139,6 +147,7 @@ The application is configured mainly through environment variables set in the `d
 *   `PORT`: The internal port the Node.js application listens on (default: `3000`).
 *   `LOG_LEVEL`: Controls the logging verbosity (e.g., `debug`, `info`, `warn`, `error`).
 *   `PING_COUNT`: Number of ping packets to send (default: `4`).
+*   `SENTRY_DSN` (Optional): Your Sentry Data Source Name for error tracking. Can be set during build via args or at runtime via environment variable.
 *   `dns` (in compose): Specifies DNS servers for the backend container, crucial for reliable rDNS lookups.
 
 The MaxMind database paths (`GEOIP_CITY_DB`, `GEOIP_ASN_DB`) are set within the backend's Dockerfile but could potentially be overridden if needed (e.g., using volumes).
@@ -146,9 +155,11 @@ The MaxMind database paths (`GEOIP_CITY_DB`, `GEOIP_ASN_DB`) are set within the
 ## 🌐 Data Sources
 
 *   **Geolocation & ASN:** This tool uses GeoLite2 data created by MaxMind, available from [https://www.maxmind.com](https://www.maxmind.com).
-    *   **Important:** The GeoLite2 databases require periodic updates. You need a MaxMind account (free) to download them. The Docker images contain the databases at build time. For long-term use, you should implement a process to update the `.mmdb` files within the `backend/data` directory (if using volumes) or rebuild the backend image regularly.
+    *   **Important:** The GeoLite2 databases require periodic updates. You need a MaxMind account (free) to download them. The Docker images contain the databases at build time. For long-term use, you should implement a process to update the `.mmdb` files within the `backend/data` directory (if using volumes) or rebuild the backend image regularly using the provided GitHub Action workflow (`maxmind-update.yml`).
 *   **Map Tiles:** Provided by OpenStreetMap contributors.
+*   **WHOIS Data:** Retrieved in real-time using the `whois-json` library, which queries standard WHOIS servers.
+*   **DNS Data:** Retrieved in real-time using Node.js' built-in `dns` module.
 
 ## 📜 License
 
-This project is licensed under the MIT License. See the `LICENSE` file for details (assuming you add one).
+This project is licensed under the MIT License. See the `LICENSE` file for details.