I have two docker-compose.yml files and one works but the other with ‘command’ that supplies ssl=on does not.

docker-compose.yml – without commaond ssl – works

services:
  postgres-example-pg-hba:
    image: mybuild:1
    secrets: 
      - pg_password
    environment:
      - POSTGRES_DB=mydb
      - POSTGRES_USER_FILE=mysuperuser
      - POSTGRES_PASSWORD_FILE=/run/secrets/pg_password
    build:
      context: .
    ports:
          - "5432:5432"
    restart: unless-stopped

secrets:
  pg_password:
    external: true

docker-compose.yml – with command ssl=on – causes error

services:
  postgres-example-pg-hba:
    image: mybuild:1
    secrets: 
      - pg_password
    environment:
      - POSTGRES_DB=mydb
      - POSTGRES_USER=mysuperuser
      - POSTGRES_PASSWORD_FILE=/run/secrets/pg_password
   command:
      -c ssl=on 
      -c ssl_cert_file=/temp/ssl/server.crt
      -c ssl_key_file=/temp/ssl/server.key
      -c ssl_ca_file=/temp/ssl/root.crt
    build:
      context: .
    ports:
          - "5432:5432"
    restart: unless-stopped

secrets:
  pg_password:
    external: true

when I run the follwing commands:

• docker build -t mybuild:1 .
• docker stack deploy –compose-file=docker-compose.yml secret_test

I get error:

yaml: line 10: did not find expected key