Running Cloud SQL proxy with docker-compose

Create a service account key file and name it serviceAccount.json right next to your docker-compose.yml file. For this example, my GCP project's id is project-ac42, chosen region is us-central1, and my Cloud SQL instance's name is playground-cloud-sql-instance

version: "3.8"
services:
  proxy:
    container_name: "cloud-sql-proxy"
    image: gcr.io/cloudsql-docker/gce-proxy:1.16
    volumes:
      - ./serviceAccount.json:/config
    ports:
      - 127.0.0.1:5432:5432
    command: "/cloud_sql_proxy -instances=playground-ace42:us-central1:playground-cloud-sql-instance=tcp:0.0.0.0:5432 -credential_file=/config"