Added RepoCloud.

Related https://github.com/wekan/wekan/pull/5463

docs/Platforms/Propietary/Cloud/RepoCloud.md

@@ -0,0 +1,3 @@
+https://repocloud.io
+
+[![Deploy on RepoCloud](https://d16t0pc4846x52.cloudfront.net/deploylobe.svg)](https://repocloud.io/details/?app_id=34)