feat: prepare nobat724_front for deployment on Liara platform

- Added Node.js engine requirement in package.json to ensure compatibility.
- Created liara-deploy.md for deployment instructions and environment setup.
- Added example environment variables in .env.liara.example for clarity.
- Introduced .liaraignore to exclude unnecessary files from deployment.
- Created liara.json for Liara configuration, including health check settings.
- Removed redundant next.config.mjs file to prevent configuration conflicts.

next.config.js

@@ -8,6 +8,10 @@ const nextConfig = {
         protocol: 'https',
         hostname: 'api.clinic-pro.ir',
       },
+      {
+        protocol: 'https',
+        hostname: 'clinicpro.liara.run',
+      },
       {
         protocol: 'http',
         hostname: 'clinic-pro.ir',