update readme

README.md

@@ -1,15 +1,24 @@
 # O11Y DEM CLI
-Node CLI Tool for uploading and listing of Android and iOS mapping files
+
+The DEM CLI Tool helps developers upload Android mapping files, iOS dSYM files, and browser source map files to the Splunk O11y Cloud backend for deobfuscating stack traces. This tool is part of Splunk's Digital Experience Monitoring (DEM) suite.
 
 ## Features
 
 * Uploading and listing of Android Proguard mapping files
 * Uploading and listing of iOS DSym mapping files
 
+## Documentation
+
+For official documentation on the Splunk O11Y DEM CLI Tool, see _______
+
 ## Sample Usage
 
 tbd
 
+## Build and Development
+
+tbd
+
 ## Troubleshooting
 
 tbd