instructions

Author: djnicholson

README.md

@@ -3,3 +3,5 @@
 This is a Visual Studio Code extension that looks for a `webpanel.json` file in the
 `.vscode` folder in the current workspace and (if it finds one) keeps a tab/tabs open at
 all times that point to the URL(s) specified in that file.
+
+`webpanel.json` should contain an array of URLs, e.g.: `["http://localhost:3000/"]`.