Social 0.4.2: How to configure peers?

Currently, mastodon.host seems to be offline:

REFUSED unexpected RCODE resolving 'mastodon.host/A/IN': 195.154.58.82#53
REFUSED unexpected RCODE resolving 'mastodon.host/AAAA/IN': 195.154.58.82#53
REFUSED unexpected RCODE resolving 'mastodon.host/A/IN': 163.172.202.42#53
REFUSED unexpected RCODE resolving 'mastodon.host/AAAA/IN': 163.172.202.42#53
REFUSED unexpected RCODE resolving 'mastodon.host/AAAA/IN': 2605:2700:0:2:a800:ff:fe61:412c#53
REFUSED unexpected RCODE resolving 'mastodon.host/A/IN': 2605:2700:0:2:a800:ff:fe61:412c#53
REFUSED unexpected RCODE resolving 'mastodon.host/AAAA/IN': 71.19.148.32#53
REFUSED unexpected RCODE resolving 'mastodon.host/A/IN': 71.19.148.32#53
client @0x7fdcb404e740 127.0.0.1#33614 (mastodon.host): query failed (failure) for mastodon.host/IN/AAAA at query.c:6883
client @0x7fdcb4037f40 127.0.0.1#33614 (mastodon.host): query failed (failure) for mastodon.host/IN/A at query.c:6883

How to configure the peers of the social app?

I can’t find any documentation of the app, neither on the Nextcloud App Store nor on the project home page. :frowning: