Add not deployed note in README.md

Youssef1313 · web-flow · commit c02d3ff38bd2 · 2020-06-19T21:59:24.000+02:00
diff --git a/README.md b/README.md
@@ -1,3 +1,5 @@
 # DotNetSyntaxTreeVisualizer
 
 .NET Syntax Tree Visualizer, A C# ASP.NET Core app with ReactJS in front-end that shows Roslyn's syntax tree for a given source code.
+
+**Note:** This web app hasn't been deployed yet.
