Update README.md

Author: vcnainala

README.md

@@ -31,6 +31,18 @@ Upcoming: [https://nmrium.nmrxiv.org/releases/v1.0.0](https://nmrium.nmrxiv.org/
 
 ```
 <iframe href='https://nmriumdev.nmrxiv.org' height="500" width="100%"></iframe>
+
+# Workspaces
+
+# Simple NMR analysis
+<iframe href='https://nmriumdev.nmrxiv.org?mode=default' height="500" width="100%"></iframe>
+
+# NMR spectra assignment
+<iframe href='https://nmriumdev.nmrxiv.org?mode=assignment' height="500" width="100%"></iframe>
+
+# 1D multiple spectra analysis
+<iframe href='https://nmriumdev.nmrxiv.org?mode=process1D' height="500" width="100%"></iframe>
+
 ```
 
 ## Public Instance