psql server closed the connection unexpectedly

[#1]

I know there is a long standing discussion  on this, however it seems I am not falling into any of the answers cited.

Ηere is my listen_address setting

cat postgresql.conf | grep -i listen
listen_addresses = '*'

cat pg_hba.conf  | grep -v '^#'
local   all             all                                     trust
host    all             all             127.0.0.1/32            trust
host    all             all             ::1/128                 trust
local   replication     all                                     trust
host    replication     all             127.0.0.1/32            trust
host    replication     all             ::1/128                 trust

This is a docker-compose setup.

What is the case here?