prodution config

[lgh06]

for both RabbitMQ / MongoDB / pm2 and nodejs and related drivers / libs.

• seeing rabbitmq retry https://www.rabbitmq.com/dlx.html#effects read. ignore now.

• and ttl https://www.rabbitmq.com/ttl.html (see packages\vendor-scripts-n-configs\README.md)

• and length limit https://www.rabbitmq.com/maxlength.html read. ignore now.

• and ack timeout https://www.rabbitmq.com/consumers.html#acknowledgement-timeout (see packages\vendor-scripts-n-configs\README.md)

• https://www.rabbitmq.com/confirms.html

• https://www.rabbitmq.com/production-checklist.html

• https://www.rabbitmq.com/monitoring.html

• https://www.rabbitmq.com/reliability.html

• https://pm2.keymetrics.io/docs/usage/startup/

• https://pm2.keymetrics.io/docs/usage/restart-strategies/

• https://docs.mongodb.com/drivers/node/v4.3/fundamentals/connection

• https://docs.mongodb.com/v5.0/tutorial/analyze-query-plan/

• https://docs.mongodb.com/v5.0/administration/configuration/#security-considerations

[lgh06]

do not retry tasks for now. always ack a message.

[lgh06]

see also #15 for safety auth.
see #20 for time-series taskHistory collection and create index

[lgh06]

#18 for mongodb replica sets and sharding