Improve Docker installation documentation
- Use
useradd
features to simplify user creation:-
-U
creates a user group, -
-G docker
adds the user to thedocker
group
-
- Document available versions and their usage
- Use
chmod 0600
before editing the file! - Use
cat
instead of multipleecho
es - Comment all lines in
.env
- Use
${FUNKWHALE_VERSION}
where applicable instead of|version|
to enable copy-pasting more commands