version: '2.1'
services:
  db:
   image: postgres:9.6-alpine
   healthcheck:
     test: nc localhost 5532 || exit 1
   container_name: postgres
   restart: always
   ports:
     - '127.0.0.1:5532:5432'
   environment:
     POSTGRES_USER: ${POSTGRESQL_USER}
     POSTGRES_PASSWORD: ${POSTGRESQL_PASSWORD}
     POSTGRES_DB: ${POSTGRESQL_DATABASE}
   volumes:
     - "/opt/dump/postgres:/docker-entrypoint-initdb.d"
     - "pg_data:/var/lib/postgresql/data"
volumes:
  pg_data:
    driver: local

test: netstat -an | grep :5532 > /dev/null; if [ 0 != $? ]; then exit 1; fi;

ERROR: Invalid interpolation format for "healthcheck" option in service "db": "netstat -an | grep :5532 > /dev/null && if [ 0 != $? ]; then exit 1; fi;"

test: [“CMD-SHELL”, “pg_isready -U postgres”]