docker: add single-container support

docker/prod/supervisord/start

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -o errexit
+set -o pipefail
+set -o nounset
+
+export TASK_WORKERS=${TASK_WORKERS:=1}
+
+exec supervisord -c /etc/supervisor/conf.d/supervisord.conf

docker/prod/supervisord/supervisord.conf

@@ -0,0 +1,40 @@
+[supervisord]
+nodaemon=true
+logfile=/dev/null
+logfile_maxbytes=0
+pidfile=/tmp/supervisord.pid
+
+[supervisorctl]
+serverurl=unix:///run/supervisord.sock
+
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
+
+[unix_http_server]
+file=/run/supervisord.sock
+chmod=0700
+
+[program:web]
+user=app
+directory=/usr/src/app
+command=/bin/bash /start
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/fd/2
+stderr_logfile_maxbytes=0
+autorestart=true
+startretries=5
+
+[program:procrastinate]
+user=app
+directory=/usr/src/app
+command=/bin/bash /start-procrastinate
+process_name=%(program_name)s_%(process_num)02d
+numprocs=%(ENV_TASK_WORKERS)s
+numprocs_start=1
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/fd/2
+stderr_logfile_maxbytes=0
+autorestart=true
+startretries=5