proposed docker-compose for tests.

docker-compose.test.yml

version: "3.5"
services:
  test-backend:
    build:
      context: .
    container_name: test-backend
    command: yarn server
    user: ${CURRENT_USER:-root}
    depends_on:
      - test-db
    environment:
      - POSTGRES_HOST=test-db
    volumes:
      - ".:/app:rw"
  test-frontend:
    build:
      context: .
    command: yarn start
    user: ${CURRENT_USER:-root}
    stdin_open: true
    volumes:
      - "./frontend:/app:rw"
      - "./scripts:/app/scripts"
    environment:
      - BACKEND_PROXY=http://test-backend:8000
  test-db:
    env_file: .env
    image: postgres:12.4

run-tests.sh

#!/bin/bash

echo "Running tests in using test config 'docker-compose.test.yml'"
# Start containers
docker-compose -f 'docker-compose.test.yml' up -d

# Let postgres initialize
sleep 5

# Migrate and seed db
docker exec test-backend bash -c "yarn db:migrate"
docker exec test-backend bash -c "yarn db:seed;"

# Test backend
docker exec test-backend bash -c "yarn test:ci"

#Test frontend
docker exec test-backend bash -c "yarn --cwd frontend run test:ci"
wait
docker-compose \
    -f 'docker-compose.test.yml' \
    down --volumes