fix: remove PostgreSQL initialization from entrypoint and update Docker configuration for external database

docker/supervisord.conf

@@ -6,18 +6,8 @@ logfile_maxbytes=0
 pidfile=/var/run/supervisord.pid
 loglevel=info
 
-[program:postgres]
-command=/usr/lib/postgresql/16/bin/postgres -D /var/lib/postgresql/data
-user=postgres
-autostart=true
-autorestart=true
-stdout_logfile=/dev/stdout
-stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
-stderr_logfile_maxbytes=0
-
 [program:backend]
- command=java -Dspring.output.ansi.enabled=always -Dlogging.level.root=DEBUG -jar /app/app.jar
+command=java -Dspring.output.ansi.enabled=always -Dlogging.level.root=DEBUG -jar /app/app.jar
 autostart=true
 autorestart=true
 startsecs=15