Add donation config

Added instructions and example for new donation config

Author: digitaldirk

MIGRATION.md

@@ -42,3 +42,20 @@ Add the following to the `appsettings.json`:
 ```
 
 Or `false` if you don't want to use this feature.
+
+### Donation configuration
+Existing donation settings are now moved to a "SupportMe" node. Copy your previously set values for `KofiToken`, `GithubSponsorName`, and `PatreonName` and follow the new format below. Use `true` or `false` to choose where you want the donation buttons to appear and also a support me page can optionally be added to the nav menu.
+
+```json
+"SupportMe": {
+	"KofiToken": "ABC123",
+	"GithubSponsorName": "your-tag-here",
+	"PatreonName": "your-tag-here",
+	"ShowUnderBlogPost": true,
+	"ShowUnderIntroduction": true,
+	"ShowInFooter": true,
+	"ShowSupportMePage": true,
+	"SupportMePageDescription": "Buy my book here: [My Blazor Book](https://google.com) or please contribute to my open-source project here: [My Awesome Repo](https://github.com) . This can be **markdown**."
+}
+```
+