Add docs for custom vite config for Herd HTTPS

panel/README.md

@@ -2,10 +2,36 @@
 
 ## Installation
 
-Our setup expects that you are running [Kirby Sandbox](https://github.com/getkirby/sandbox), our our local test environment, at `http://sandbox.test`. You can reach the Panel at `http://sandbox.test/panel`.
+Our setup expects that you are running [Kirby Sandbox](https://github.com/getkirby/sandbox), our our local test environment, at `https://sandbox.test`. You can reach the Panel at `https://sandbox.test/panel`.
+
+We are using [Herd](https://herd.laravel.com) to run our setup locally.
 
 If you are using a different setup, you might need to create a `/panel/vite.config.custom.js` where you can point `vite` to the right server.
 
+### Using Herd with HTTPS
+
+If you're using [Herd](https://herd.laravel.com) in your local setup, you will need to enable HTTPS for the site and add the following `/panel/vite.config.custom.js`:
+
+```node
+/* eslint-env node */
+import fs from "fs";
+
+module.exports = {
+	https: {
+		key: fs.readFileSync(
+			"/Users/XYZ/Library/Application Support/Herd/config/valet/Certificates/sandbox.test.key"
+		),
+		cert: fs.readFileSync(
+			"/Users/XYZ/Library/Application Support/Herd/config/valet/Certificates/sandbox.test.crt"
+		)
+	}
+};
+```
+
+Replace `XYZ` with your username. Adapt the whole path if those Herd files are located elsewhere (e.g. on Windows).
+
+### `panel.dev` mode
+
 When developing, make sure to put Kirby into development mode by adding the following line to `site/config/config.php` of your Kirby project (unless you are using the Sandbox, which uses dev mode by default):
 
 ```php