README: coffee button at the top

README.md

@@ -1,5 +1,7 @@
 # archify-vscode-ext-sync-gitops-tmpl
 
+[![Buy me a coffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://buymeacoffee.com/root.at.skic)
+
 A [Copier](https://copier.readthedocs.io) template for deploying [Archify Sync](https://gitea.lego-cloud.eu/vscode-extensions/archify-vscode-ext-sync) with [Argo CD](https://argo-cd.readthedocs.io). It renders an environment repository that Argo CD syncs: an app-of-apps, the server's Helm chart (taken from the server repository) and its values. Keep your answers in the environment repository; never hand-edit what Copier renders there.
 
 ```text
@@ -53,3 +55,9 @@ task render:answers  # after editing the environment repo's cluster/copier-answe
 ```
 
 `copier update` needs this repository committed and tagged; the environment repository records the template's version.
+
+## Support
+
+Archify Sync is built and maintained in my spare time. If it helps you, a coffee keeps the releases coming:
+
+[![Buy me a coffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://buymeacoffee.com/root.at.skic)