### ofe는 도커 아이디
docker exec -it 0fe psql -U postgres
SHOW max_connections;
postgres=# SHOW max_connections;
max_connections
-----------------
100
(1 row)
SHOW config_file;
max_connections = 300
## 나노 설치 및 config 수정 ##
apt-get update
apt-get install nano -y
nano /path/to/postgresql.conf
SHOW max_connections;