Connect to postgres database behind nginx reverse-proxy using docker containers

I have set up a postgres database container and can connect and query it directly using its published port 5434.

The goal is to deploy the test database later and access it via nginx reverse proxy. I don't know what is the best way to connect to a deployed test database. Please advise.

I have tried to connect to a postgres database via nginx reverse proxy using local containers.

Using command:

psql -h localhost -p 5435 -U postgres database_name_container_test

Nginx shows error:

reverse-proxy | 2021/10/29 20:06:57 [info] 32#32: *17 client 172.25.0.1:56630 connected to 0.0.0.0:5435
reverse-proxy | 2021/10/29 20:06:57 [error] 32#32: *17 connect() failed (111: Connection refused) while connecting to upstream, client: 172.25.0.1, server:
0.0.0.0:5435, upstream: "172.25.0.3:5434", bytes from/to client:0/0, bytes from/to upstream:0/0

nginx.conf:

stream {    
    upstream database_test {
        server postgres_test:5434;
    }
    server {
        listen 5435 so_keepalive=on;
        proxy_pass database_test;

    }
}

test_db docker-compose:

services:
  postgres_test:
    container_name: postgres_test
    image: postgis/postgis
    restart: always
    expose:
      - 5432
    ports:
      - 5434:5432
    volumes:
      - ./backup:/backup
      - ./postgres-init-db.sh:/docker-entrypoint-initdb.d/postgres-init-db.sh
      - postgres_test_data:/var/lib/postgresql/data
    env_file:
      - ./.env.postgres
    networks:
      - common-network

volumes:
  postgres_test_data:

networks:
  common-network:
    external:
      name: common-network

reverse-proxy docker-compose:

networks:
  common-network: #name in this docker-compose file
    name: common-network # the actual name of the network

services:

  nginx:
    image: nginx:1.20.1
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
    ports:
      - 80:80
      - 443:443
      - 5435:5435
    container_name: reverse-proxy
    networks:
      - common-network

Additionally I checked postgres configuration files, they seem to be correct:

cat postgresql.conf | grep listen_addresses
listen_addresses = '*'


cat pg_hba.conf | grep host
host all all all md5