add open collective

.gitea/issue_templates/improvement_template.md

@@ -8,5 +8,8 @@
 - [ ] Friendica
 - [ ] Pixelfed
 
+<!-- Describe the improvement here -->
+
+
 <!-- If you read our contributing advice -->
 [ ] - I read the [contributing page](../../CONTRIBUTING.md)

README.md

@@ -7,6 +7,9 @@
 
 [<img alt="Donate using Liberapay" src="https://img.shields.io/liberapay/patrons/tom79.svg?logo=liberapay"/>](https://liberapay.com/tom79/donate)
 
+
+<script src="https://opencollective.com/fedilab/:verb/button.js" color="blue"></script>
+
 ## Download
 
 [<img alt='Get it on Google Play' src='./images/get-it-on-play.png' height="80"/>](https://play.google.com/store/apps/details?id=app.fedilab.android)
@@ -22,3 +25,4 @@
 Lead developer: [toot.fedilab.app/@apps](https://toot.fedilab.app/@apps)
 
 
+<script src="https://opencollective.com/:collectiveSlug/banner.js"></script>