Docs(Deploying): add justdeploy as Deploying solution

docs/pages/docs/deploying/justdeploy.md

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+# JustDeploy
+
+[JustDeploy](https://github.com/cchalop1/JustDeploy) is an open-source tool that makes **self-hosting your applications incredibly easy**.
+
+It provides a lightweight web interface to organize projects, databases, and environments — without needing to write any Docker or server configuration. With JustDeploy, you can deploy your app to your own VPS in just one click, with no vendor lock-in.
+
+## 🚀 Built-in Nixpacks support
+
+JustDeploy uses **Nixpacks by default** to build application images directly from your Git repository. This ensures simple, reproducible builds with zero configuration.
+
+> Example: When a user connects their GitHub repo to JustDeploy, the app is automatically built using Nixpacks and deployed to their server with a clean, production-ready setup.
+
+## 🔗 Useful links
+
+- 💻 GitHub: [github.com/cchalop1/JustDeploy](https://github.com/cchalop1/JustDeploy)
+- 🌐 Website: [justdeploy.app](https://justdeploy.app)
+- 📦 Powered by: [Railway Nixpacks](https://github.com/railwayapp/nixpacks)
+
+---
+
+If you're looking for a simple yet powerful way to self-host your apps using Nixpacks, JustDeploy is a great option to explore.