version: '3'

services:

  synapse_db:
    image: docker.io/postgres:14-alpine
    restart: unless-stopped
    environment:
      - POSTGRES_USER=synapse
      - POSTGRES_PASSWORD=aComplexPassphraseNobodyCanGuess
      - POSTGRES_INITDB_ARGS=--encoding=UTF-8 --lc-collate=C --lc-ctype=C
    volumes:
      - synapse_db_data:/var/lib/postgresql/data

volumes:
  synapse_db_data: