Docker - Compose Je ne peux pas créer de serveur postgres

Bonjour, j'essaye de créer un docker de composition postgres pg admin 4 et node

mais j'ai des difficultés et je ne peux pas créer mon serveur:

J'ai essayé avec tous les noms possibles et je ne sais pas ce que je me trompe:

mon docker compose:

docker container ls
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                            NAMES
3a20bcd4f105        emasa-web           "docker-entrypoint.s…"   5 minutes ago       Up 5 minutes        0.0.0.0:4000->4000/tcp           back-end_web_1
b377e650e772        dpage/pgadmin4      "/entrypoint.sh"         14 minutes ago      Up 14 minutes       443/tcp, 0.0.0.0:16543->80/tcp   back-end_teste-pgadmin-compose_1

DockerFile :

Attaching to back-end_web_1, back-end_emasa-postgres_1, back-end_teste-pgadmin-compose_1
emasa-postgres_1         | The files belonging to this database system will be owned by user "postgres".
emasa-postgres_1         | This user must also own the server process.
emasa-postgres_1         |
emasa-postgres_1         | The database cluster will be initialized with locale "en_US.utf8".
emasa-postgres_1         | The default database encoding has accordingly been set to "UTF8".
emasa-postgres_1         | The default text search configuration will be set to "english".
emasa-postgres_1         |
emasa-postgres_1         | Data page checksums are disabled.
emasa-postgres_1         |
emasa-postgres_1         | fixing permissions on existing directory /var/lib/postgresql/data ... ok
emasa-postgres_1         | creating subdirectories ... ok
emasa-postgres_1         | selecting dynamic shared memory implementation ... posix
emasa-postgres_1         | selecting default max_connections ... 20
emasa-postgres_1         | selecting default shared_buffers ... 400kB
emasa-postgres_1         | selecting default time zone ... Etc/UTC
emasa-postgres_1         | creating configuration files ... ok
emasa-postgres_1         | 2020-03-17 23:48:08.890 UTC [81] FATAL:  data directory "/var/lib/postgresql/data" has wrong ownership
emasa-postgres_1         | 2020-03-17 23:48:08.890 UTC [81] HINT:  The server must be started by the user that owns the data directory.
emasa-postgres_1         | child process exited with exit code 1
emasa-postgres_1         | initdb: removing contents of data directory "/var/lib/postgresql/data"
emasa-postgres_1         | running bootstrap script ... web_1                    | Error: getaddrinfo ENOTFOUND db

ma configuration orm:

{
  "type": "postgres",
  "host": "db",
  "port": 5432,
  "username": "postgres",
  "password": "emasa@",
  "database": "postgres",
  "synchronize": true,
  "logging": false,
  "entities": ["src/entity/**/*.ts"],
  "migrations": ["src/migration/**/*.ts"],
  "subscribers": ["src/subscriber/**/*.ts"],
  "cli": {
    "entitiesDir": "src/entity",
    "migrationsDir": "src/migration",
    "subscribersDir": "src/subscriber"
  }
}

mes loggers docker-compose: p>

FROM node as builder
WORKDIR usr/app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build


FROM node
WORKDIR usr/app
COPY package*.json ./
RUN npm install --production

COPY --from=builder /usr/app/dist ./dist

COPY ormconfig.docker.json ./ormconfig.json
COPY .env . 

expose 4000
CMD node dist/src/index.js

mon conteneur ls:

version: "3.7"
services:
  emasa-postgres:
    image: postgres
    environment:
      POSTGRES_PASSWORD: emasa@
      POSTGRES_USER: postgres
      POSTGRES_DB: emasa
    volumes:
      - ./pgdata:/var/lib/postgresql/data
    ports:
      - "5432:5432"
    networks:
      - postgres-compose-network
  web:
    image: emasa-web
    depends_on:
      - emasa-postgres
    ports:
      - "4000:4000"
    networks:
      - postgres-compose-network
  teste-pgadmin-compose:
    image: dpage/pgadmin4
    environment:
      PGADMIN_DEFAULT_EMAIL: "emasa@hotmail.com"
      PGADMIN_DEFAULT_PASSWORD: "emasa"
    ports:
      - "16543:80"
    depends_on:
      - emasa-postgres
    networks:
      - postgres-compose-network

networks:
  postgres-compose-network:
    driver: bridge

[! [entrez la description de l'image ici] [2]] [2] p >

J'ai vraiment essayé avec les noms de conteneurs:

emasa-postgres_1 emasa-postgres

et en vain