Nginx – PostgreSQL database was dropped many times suddenly

on my server ( ubuntu by nginx , docker and Django by gunicorn)

the site is run good but the database sometimes dropped suddenly and i lost my data
this thing many repeated

when i back to
/var/log/postgresql/postgresql-14-main.log

"2023-10-28 12:12:17.689 UTC [3752923] postgres@postgres DETAIL:  Connection matched pg_hba.conf line 102: "host all             all             0.0.0.0/0              >
2023-10-28 12:12:21.050 UTC [3753069] postgres@template0 FATAL:  database "template0" is not currently accepting connections
2023-10-28 12:12:43.319 UTC [3706001] postgres@aeraeg_db FATAL:  terminating connection due to administrator command
2023-10-28 12:12:44.912 UTC [3753497] postgres@postgres ERROR:  cannot drop the currently open database
2023-10-28 12:12:44.912 UTC [3753497] postgres@postgres STATEMENT:  DROP DATABASE postgres;
2023-10-28 12:12:45.541 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/memory"
2023-10-28 12:12:45.541 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/prememory"
2023-10-28 12:12:46.226 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/memory"
2023-10-28 12:12:46.226 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/prememory"
2023-10-28 12:12:48.206 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/memory"
2023-10-28 12:12:48.206 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/prememory"
2023-10-28 12:12:48.556 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/memory"
2023-10-28 12:12:48.556 UTC [3244077] LOG:  could not parse file name "pg_logical/snapshots/prememory"
2023-10-28 12:14:11.702 UTC [3755239] postgres@aeraeg_db FATAL:  database "aeraeg_db" does not exist" 

how i can protect my database from dropped down