Move Github'y files into the .github folder

src/Umbraco.Web.UI.Client/.github/README.md

@@ -0,0 +1,41 @@
+# Umbraco.CMS.Backoffice
+
+## Installation instructions
+
+1. Run `npm install`
+2. Run `npm run dev` to launch Vite in dev mode
+
+### Environment variables
+
+The development environment supports `.env` files, so in order to set your own make a copy
+of `.env` and name it `.env.local` and set the variables you need.
+
+As an example to show the installer instead of the login screen, set the following
+in the `.env.local` file to indicate that Umbraco has not been installed:
+
+```bash
+VITE_UMBRACO_INSTALL_STATUS=must-install
+```
+
+## Environments
+
+### Development
+
+The development environment is the default environment and is used when running `npm run dev`. All API calls are mocked and the Umbraco backoffice is served from the `src` folder.
+
+### Run against a local Umbraco instance
+
+Create a `.env.local` file and set the following variables:
+
+```bash
+VITE_UMBRACO_API_URL=http://localhost:5000 # This will be the URL to your Umbraco instance
+VITE_UMBRACO_USE_MSW=off # Indicate that you want all API calls to bypass MSW (mock-service-worker)
+```
+
+### Static website
+
+See the Main branch in action here as an [Azure Static Web App](https://ashy-bay-09f36a803.1.azurestaticapps.net/). The deploy runs automatically every time the `main` branch is updated. It uses mocked responses from the Umbraco API to simulate the site just like the local development environment.
+
+### Storybook
+
+Storybook is also being built and deployed automatically on the Main branch, including a preview URL on each pull request. See it in action on this [Azure Static Web App](https://ambitious-stone-0033b3603.1.azurestaticapps.net/).