To set up an activity feed on our server, we first need to register an account on Mastadon.
Now we open our Mastadon Profile and copy our username, in our case this is
Now we can open our "Configs" on our FiveM server and edit the server.cfg:
We now insert the following line at the very bottom:
sets activitypubFeed username
"username" should be replaced with your mastadon username.
Now we save the file and restart our server, after ~20 minutes the "Feed" tab will be available after your server is opened.