Setup Postgres in a Docker Container

To setup a project with a postgres database container, add a service to a new or existing docker-compose.yml file in the project codebase, and add the following code:

services:
  db:
    image: postgres:12
    ports:
      - "5432:5432"
    environment:
      - "POSTGRES_HOST_AUTH_METHOD=trust"
      - "POSTGRES_DB=${POSTGRES_DATABASE_NAME}"
      - "POSTGRES_USER=${POSTGRES_DATABASE_USER}"
      - "POSTGRES_PASSWORD=${POSTGRES_DATABASE_PASSWORD}"