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Creating your own federated microblog
In this tutorial, we will build a small microblog that implements the ActivityPub protocol, similar to Mastodon or Misskey, using Fedify, an ActivityPub server framework.
We assume that you have experience in creating web applications using HTML and HTTP, and that you understand command-line interfaces, SQL, JSON, and basic JavaScript. This time too, we need to send an activity, so use the fedify tunnel command to expose the local server to the public internet, then enter the https://temp-address.serveo.net/ page (replace the domain name) in your web browser: Therefore, a malicious ActivityPub server could send a Create(Note) activity containing HTML like<script>while (true) alert('Gotcha!');</script>.
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