Fix bug and reduce docker images

[khaman1]

[khaman1]

Because the channel sometimes will get timed out and deleted, so recall the function create_channel will make the channel available, even if the channel does exist. For more details, please read here: https://www.rabbitmq.com/tutorials/tutorial-one-python.html

[pangoro24]

thanks @khaman1 . Using your fix, the producer is working perfectly