Add a note on local windows installation in README (#79)

Author: lrlna

README.md

@@ -88,7 +88,19 @@ npm install
 npm run local-install
 ```
 
-This will compile and package MongoDB for VS Code into a `.vsix` file and add the extension to your VS Code. If you get an error because the `code` command is not found, you need to install it in your `$PATH`.
+This will compile and package MongoDB for VS Code into a `.vsix` file and add the extension to your VS Code.
+
+To install this locally on windows:
+```shell
+npm install
+.\node_modules\.bin\vsce.cmd package
+code --install-extension ./mongodb-vscode-*.vsix
+```
+
+This will compile and package MongoDB for VS Code into a `.vsix` file and add the extension to your VS Code.
+
+If you get an error because the `code` command is not found, you need to install it in your `$PATH`.
+
 Open VS Code, launch the Commmand Palette (⌘+Shift+P on MacOS, Ctrl+Shift+P on Windows and Linux), type `code` and select "Install code command in \$PATH".
 
 ## License