canvas-lms/docker-compose/puma.override.yml

# to use this add docker-compose/puma.override.yml to your COMPOSE_FILE var in .env and rebuilid your web container

# When you use this container you can pass RUBY_DEBUG_OPEN=true or RUBY_DEBUG_START=true to a run of the container like:
# docker compose run -e RUBY_DEBUG_OPEN=true -P --rm web
#
# Altenatively you can uncomment the environment variable below, but that can cause issues if you run commands that kick
# off multiprocessing

version: '2.3'
services:
  web:
    build:
      dockerfile: Dockerfile.puma
    environment:
      # RUBY_DEBUG_OPEN: true
      RUBY_DEBUG_PORT: 12345
      RUBY_DEBUG_HOST: 0.0.0.0
      VIRTUAL_PORT: 80
      PIDFILE: /tmp/pids/server.pid
    ports:
      - "12345:12345"
    tmpfs:
      - /tmp/pids:mode=1777