Done via the following command:
git diff fcd5dd25 --stat --name-only | xargs sed -i '/Pleroma Authors/c# Copyright © 2017-2020 Pleroma Authors <https:\/\/pleroma.social\/>'

Done via the following command:
git diff 1e6c102b --stat --name-only | cat - | xargs sed -i 's/2017-2018 Pleroma Authors/2017-2019 Pleroma Authors/'

we can't change module attributes and endpoint settings in runtime

task docs

It was a misunderstanding

unhardcode: remove hardcoded /instance/static and actually use the config option
as it is used in other places.

packs without emoji.txt: these are now assumed to have .png files that
are all emojis, their names are used as shortcodes

The file should be in the same directory as the manifest file

A custom manifest can be provided as a command-line options --manifest/-m

These packs are stored in a git repo on pleroma gitlab