fresh read me (#5)

Author: chinesebear

README.md

@@ -1,4 +1,16 @@
-## Deepvm 
+## DeepVM
+
+### A Brief Introduction of DeepVM
+
+<img src="./doc/assets/deepvm-logo.png" width="40%" />
+
+DeepVM is a virtual machine, as the backend of DeepLang, a new language for IoT device.
+
+Our goal is to make the WebAssembly IR run on the virtual machine.
+
+At present, our project is still in the initial stage of development. We support a limited set of introductions, including addition, subtraction, multiplication and division, etc.
+
+In the future, we will support more instructions according to the needs of the DeepLang.
 
 ### How to build?