Added force disconnect from server

proj-web/README.md

@@ -1,9 +1,14 @@
 # how to build
 
+If emsdk is not installed, you need to clone it from here: https://github.com/emscripten-core/emsdk
 
-Activate the environment:
+and install:
 ```
 C:\Work\Projects\emsdk\emsdk.bat install latest
+```
+
+Then activate the environment:
+```
 C:\Work\Projects\emsdk\emsdk.bat activate latest
 C:\Work\Projects\emsdk\emsdk_env.bat
 ```