Hi @yanokwa, I have discovered an alternative method for connecting ODK Central to localhost Postgres. Here are the modifications I made:
Environment variable changes:
DB_HOST=192.X.X.X
DB_USER=odk
DB_PASSWORD=XXXX
DB_NAME=odk
Modifications in postgresql.conf:
listen_addresses ='localhost,192.X.X.X'
Modifications in pg_hba.conf:
host all all 172.0.0.0/8 md5
These adjustments have proven to be effective, and thanks for the support.