I've seen the backup plugin for the client.

Is there something similar for the server ? If not, what are the datas I need to backup ?

In my docker, I have :

base/
global/
pg_commit_ts/
pg_dynshmem/
pg_logical/
pg_multixact/
pg_notify/
pg_repslot/
pg_serial/
pg_snapshots/
pg_stat/
pg_stat_tmp/
pg_subtrans/
pg_tblspc/
pg_twophase/
pg_wal/
pg_xact/
pg_hba.conf
pg_ident.conf
PG_VERSION
postgresql.auto.conf
postgresql.conf
postmaster.opts
postmaster.pid

Thx