The entrypoint of `webdevops/php-nginx:7.4` allows to start a different entrypoint script. The default starts the supervisord but we can switch to a worker.

worker.conf

# Copy this file to /opt/docker/etc/supervisor.d/worker.conf

[group:worker]
programs=queue-worker
priority=25

[program:queue-worker]
command = /app/bin/console messenger:consume default --time-limit=180 -vv
user = application
process_name=%(program_name)s
startsecs = 0
autostart = false
autorestart = true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0

worker.sh

#!/usr/bin/env bash

# Copy this file to /opt/docker/bin/entrypoint.d/worker.sh

# Clear all other processes
cp /opt/docker/etc/supervisor.d/worker.conf /tmp/worker.conf
rm -f /opt/docker/etc/supervisor.d/*.conf
mv /tmp/worker.conf /opt/docker/etc/supervisor.d/worker.conf

# Enable the worker service (disabled by default)
docker-service enable worker

#############################################
## Supervisord (start daemons)
#############################################

## Start services
exec /opt/docker/bin/service.d/supervisor.sh