Update docker-compose container db comment to acknowledge n+1 groundswell activation

[gwright99]

Existing docker-compose.yml has the following comment re: container db & groundswell:

version: "3"
services:
  db:
    image: mysql:8.0
    platform: linux/amd64
    networks:
      - backend
    expose:
      - 3306
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
      MYSQL_USER: tower
      MYSQL_PASSWORD: tower
      MYSQL_DATABASE: tower
    healthcheck:
      test: ["CMD", "mysqladmin" , "ping", "-h", "localhost"]
      timeout: 20s
      retries: 10
    restart: always
    volumes:
      #  To use the pipeline resource optimization service, uncomment the lines below to mount the initialization script
      #  - type: bind
      #    source: ./init.sql
      #    target: /docker-entrypoint-initdb.d/init.sql

      # Store the MySQL data in a directory on the host
      - $HOME/.tower/db/mysql:/var/lib/mysql

Uncommenting the init.sql block won't actually work if the data directory already exists.

Guidance should be added to the groundswell comment that post-deployment activation of groundswell requires manual intervention by the system maintainer.